diff --git a/app/controllers/ClientController.php b/app/controllers/ClientController.php
index a61eba49f334..0c08c2a4a304 100755
--- a/app/controllers/ClientController.php
+++ b/app/controllers/ClientController.php
@@ -224,7 +224,7 @@ class ClientController extends \BaseController {
 			{
 				if (!in_array($contact->public_id, $contactIds))
 				{	
-					$contact->forceDelete();
+					$contact->delete();
 				}
 			}
 			
diff --git a/app/controllers/CreditController.php b/app/controllers/CreditController.php
index af84bae7ca5c..96322dc4b726 100755
--- a/app/controllers/CreditController.php
+++ b/app/controllers/CreditController.php
@@ -68,10 +68,11 @@ class CreditController extends \BaseController {
     }
 
 
-    public function create($clientPublicId = null)
+    public function create($clientPublicId = 0, $invoicePublicId = 0)
     {       
         $data = array(
             'clientPublicId' => $clientPublicId,
+            'invoicePublicId' => $invoicePublicId,
             'credit' => null, 
             'method' => 'POST', 
             'url' => 'credits', 
diff --git a/app/controllers/HomeController.php b/app/controllers/HomeController.php
index b77351d86b72..36f47935e8f4 100755
--- a/app/controllers/HomeController.php
+++ b/app/controllers/HomeController.php
@@ -8,4 +8,24 @@ class HomeController extends BaseController {
 	{
 		return View::make('splash');
 	}
+
+	public function logError()
+	{
+		$count = Session::get('error_count', 0);
+		Session::put('error_count', ++$count);
+		if ($count > LOGGED_ERROR_LIMIT) return 'logged';
+
+		$data = [
+			'context' => 'JavaScript',
+			'user_id' => Auth::check() ? Auth::user()->id : 0,
+			'url' => Input::get('url'),
+			'user_agent' => $_SERVER['HTTP_USER_AGENT'],
+			'ip' => Request::getClientIp(),
+			'count' => $count
+		];
+
+		Log::error(Input::get('error'), $data);
+
+		return 'logged';
+	}
 }
\ No newline at end of file
diff --git a/app/controllers/InvoiceController.php b/app/controllers/InvoiceController.php
index 425805a7c453..2841a7b45af3 100755
--- a/app/controllers/InvoiceController.php
+++ b/app/controllers/InvoiceController.php
@@ -444,7 +444,7 @@ class InvoiceController extends \BaseController {
 				}				
 				else if (!in_array($contact->id, $sendInvoiceIds) && $invitation)
 				{
-					$invitation->forceDelete();
+					$invitation->delete();
 				}
 			}						
 
diff --git a/app/controllers/PaymentController.php b/app/controllers/PaymentController.php
index 4cf77d6ca242..7fdd1df73228 100755
--- a/app/controllers/PaymentController.php
+++ b/app/controllers/PaymentController.php
@@ -70,10 +70,11 @@ class PaymentController extends \BaseController
     }
 
 
-    public function create($clientPublicId = 0)
+    public function create($clientPublicId = 0, $invoicePublicId = 0)
     {       
         $data = array(
             'clientPublicId' => $clientPublicId,
+            'invoicePublicId' => $invoicePublicId,
             'invoice' => null,
             'invoices' => Invoice::scope()->with('client')->where('balance','>',0)->orderBy('invoice_number')->get(),
             'payment' => null, 
diff --git a/app/filters.php b/app/filters.php
index 51c8537b298f..13a0adfef686 100755
--- a/app/filters.php
+++ b/app/filters.php
@@ -74,6 +74,7 @@ Route::filter('guest', function()
 Route::filter('csrf', function()
 {
 	$token = Request::ajax() ? Request::header('X-CSRF-Token') : Input::get('_token');
+	
    	if (Session::token() != $token) {
 		throw new Illuminate\Session\TokenMismatchException;
    	}
diff --git a/app/ninja/repositories/ClientRepository.php b/app/ninja/repositories/ClientRepository.php
index 8b6cf6a5f290..dbfed6632a93 100755
--- a/app/ninja/repositories/ClientRepository.php
+++ b/app/ninja/repositories/ClientRepository.php
@@ -67,7 +67,7 @@ class ClientRepository
 		{
 			if (!in_array($contact->public_id, $contactIds))
 			{	
-				$contact->forceDelete();
+				$contact->delete();
 			}
 		}
 
diff --git a/app/routes.php b/app/routes.php
index fb8635382e0c..df240df35178 100755
--- a/app/routes.php
+++ b/app/routes.php
@@ -21,13 +21,14 @@
 include_once(app_path().'/libraries/utils.php');  // TODO_FIX
 include_once(app_path().'/handlers/UserEventHandler.php');  // TODO_FIX
 
-
+// TODO_FIX replace with cron
 Route::get('/send_emails', function() {
 	Artisan::call('ninja:send-invoices');	
 });
 
 
 Route::get('/', 'HomeController@showWelcome');
+Route::get('log_error', 'HomeController@logError');
 Route::post('get_started', 'AccountController@getStarted');
 
 Route::get('view/{invoice_key}', 'InvoiceController@view');
@@ -71,13 +72,13 @@ Route::group(array('before' => 'auth'), function()
 
 	Route::get('payments/{id}/edit', function() { return View::make('header'); });
 	Route::resource('payments', 'PaymentController');
-	Route::get('payments/create/{client_id?}', 'PaymentController@create');
+	Route::get('payments/create/{client_id?}/{invoice_id?}', 'PaymentController@create');
 	Route::get('api/payments/{client_id?}', array('as'=>'api.payments', 'uses'=>'PaymentController@getDatatable'));
 	Route::post('payments/bulk', 'PaymentController@bulk');
 	
 	Route::get('credits/{id}/edit', function() { return View::make('header'); });
 	Route::resource('credits', 'CreditController');
-	Route::get('credits/create/{client_id?}', 'CreditController@create');
+	Route::get('credits/create/{client_id?}/{invoice_id?}', 'CreditController@create');
 	Route::get('api/credits/{client_id?}', array('as'=>'api.credits', 'uses'=>'CreditController@getDatatable'));	
 	Route::post('credits/bulk', 'CreditController@bulk');
 	
@@ -147,6 +148,7 @@ define("ACCOUNT_EXPORT", "export");
 
 define("DEFAULT_INVOICE_NUMBER", "0001");
 define("RECENTLY_VIEWED_LIMIT", 8);
+define("LOGGED_ERROR_LIMIT", 100);
 
 define('INVOICE_STATUS_DRAFT', 1);
 define('INVOICE_STATUS_SENT', 2);
diff --git a/app/start/global.php b/app/start/global.php
index 1f458bbd736c..75807ed7a5a7 100755
--- a/app/start/global.php
+++ b/app/start/global.php
@@ -52,7 +52,16 @@ Log::useDailyFiles(storage_path().'/logs/'.$logFile);
 
 App::error(function(Exception $exception, $code)
 {
-	Log::error($exception);
+	$data = [
+		'context' => 'PHP',
+		'user_id' => Auth::check() ? Auth::user()->id : 0,
+		'code' => $code,
+		'url' => Request::url(),
+		'user_agent' => $_SERVER['HTTP_USER_AGENT'],
+		'ip' => Request::getClientIp()		
+	];
+
+	Log::error($exception, $data);
 });
 
 /*
diff --git a/app/views/credits/edit.blade.php b/app/views/credits/edit.blade.php
index 05113368629d..1c5851cb1c05 100755
--- a/app/views/credits/edit.blade.php
+++ b/app/views/credits/edit.blade.php
@@ -12,13 +12,6 @@
 		'client' => 'required',
   		'amount' => 'required',		
 	)); }}
-
-	@if ($credit)
-		{{ Former::populate($credit) }}
-	@else
-		{{ Former::populateField('credit_date', Utils::today()) }}
-	@endif
-
 	
 	<div class="row">
 		<div class="col-md-8">
@@ -57,20 +50,12 @@
 
 	$(function() {
 
-		@if ($clientPublicId)
-			$('select#client').val({{ $clientPublicId }});
-		@endif		
-		
-		populateInvoiceComboboxes();
+		populateInvoiceComboboxes({{ $clientPublicId }}, {{ $invoicePublicId }});
 
 
 		$('#currency_id').combobox();
 		
-		$('#credit_date').datepicker({
-			autoclose: true,
-			todayHighlight: true,
-			keyboardNavigation: false
-		});
+		$('#credit_date').datepicker('update', new Date({{ strtotime(Utils::today()) * 1000 }}));
 
 	});
 
diff --git a/app/views/header.blade.php b/app/views/header.blade.php
index 9d678b6fba38..f855a0969ca3 100755
--- a/app/views/header.blade.php
+++ b/app/views/header.blade.php
@@ -22,7 +22,8 @@
     <script type="text/javascript" src="{{ asset('js/knockout.mapping-latest.js') }}"></script>
     <script src="{{ asset('js/knockout-sortable.js') }}" type="text/javascript"></script>		
 	<link rel="stylesheet" type="text/css" href="{{ asset('css/font-awesome.css') }}"/>
-	<script src="{{ asset('js/underscore-min.js') }}" type="text/javascript"></script>		
+	<script src="{{ asset('js/underscore.js') }}" type="text/javascript"></script>		
+
 	
 	<script src="{{ asset('js/jspdf.source.js') }}" type="text/javascript"></script>		
 	<script src="{{ asset('js/jspdf.plugin.split_text_to_size.js') }}" type="text/javascript"></script>		
@@ -48,6 +49,7 @@
 	</style>
 
 	<script type="text/javascript">
+
 		var currencies = {{ Currency::remember(120)->get(); }};
 		var currencyMap = {};
 		for (var i=0; i<currencies.length; i++) {
diff --git a/app/views/invoices/edit.blade.php b/app/views/invoices/edit.blade.php
index 8d1714616793..c1d083a93ada 100755
--- a/app/views/invoices/edit.blade.php
+++ b/app/views/invoices/edit.blade.php
@@ -61,13 +61,13 @@
 		<div class="col-md-4" id="col_2">
 			<div data-bind="visible: !is_recurring()">
 				{{ Former::text('invoice_number')->label('Invoice #')->data_bind("value: invoice_number, valueUpdate: 'afterkeydown'") }}
-				{{ Former::text('invoice_date')->data_bind("value: invoice_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
-				{{ Former::text('due_date')->data_bind("value: due_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}							
+				{{ Former::text('invoice_date')->data_bind("datePicker: invoice_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
+				{{ Former::text('due_date')->data_bind("datePicker: due_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}							
 			</div>
 			<div data-bind="visible: is_recurring">
 				{{ Former::select('frequency_id')->label('How often')->options($frequencies)->data_bind("value: frequency_id") }}
-				{{ Former::text('start_date')->data_bind("value: start_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
-				{{ Former::text('end_date')->data_bind("value: end_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
+				{{ Former::text('start_date')->data_bind("datePicker: start_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
+				{{ Former::text('end_date')->data_bind("datePicker: end_date, valueUpdate: 'afterkeydown'")->data_date_format(Session::get(SESSION_DATE_PICKER_FORMAT)) }}
 			</div>
 			@if ($invoice && $invoice->recurring_invoice_id)
 				<div class="pull-right" style="padding-top: 6px">
@@ -191,9 +191,18 @@
 		</div>
 
 
-		{{ Button::normal('Download PDF', array('onclick' => 'onDownloadClick()')) }}	
-
 		@if ($invoice)		
+			{{ DropdownButton::normal('Download PDF',
+				  Navigation::links(
+				    array(
+				    	array('Download PDF', "javascript:onDownloadClick()"),
+				     	array(Navigation::DIVIDER),
+				     	array('Create Payment', "javascript:onPaymentClick()"),
+				     	array('Create Credit', "javascript:onCreditClick()"),
+				    )
+				  )
+				, array('id'=>'actionDropDown', 'style'=>'text-align:left', 'data-bind'=>'css: $root.enable.save'))->split(); }}				
+
 			{{ DropdownButton::primary('Save Invoice',
 				  Navigation::links(
 				    array(
@@ -206,6 +215,7 @@
 				  )
 				, array('id'=>'actionDropDown', 'style'=>'text-align:left', 'data-bind'=>'css: $root.enable.save'))->split(); }}				
 		@else
+			{{ Button::normal('Download PDF', array('onclick' => 'onDownloadClick()')) }}	
 			{{ Button::primary_submit('Save Invoice', array('data-bind'=>'css: $root.enable.save')) }}			
 		@endif
 
@@ -361,11 +371,7 @@
 		$('#country_id').combobox();
 		$('[rel=tooltip]').tooltip();
 
-		$('#invoice_date, #due_date, #start_date, #end_date').datepicker({
-			autoclose: true,
-			todayHighlight: true,
-			keyboardNavigation: false
-		});
+		$('#invoice_date, #due_date, #start_date, #end_date').datepicker();
 
 		@if ($client && !$invoice)
 			$('input[name=client]').val({{ $client->public_id }});
@@ -525,6 +531,16 @@
 		$('.main_form').submit();
 	}
 
+	@if ($client && $invoice)
+	function onPaymentClick() {
+		window.location = '{{ URL::to('payments/create/' . $client->public_id . '/' . $invoice->public_id ) }}';
+	}
+
+	function onCreditClick() {
+		window.location = '{{ URL::to('credits/create/' . $client->public_id . '/' . $invoice->public_id ) }}';
+	}
+	@endif
+
 	function onArchiveClick() {
 		$('#action').val('archive');
 		$('.main_form').submit();
diff --git a/app/views/master.blade.php b/app/views/master.blade.php
index 61758ec24d47..25297bba703d 100755
--- a/app/views/master.blade.php
+++ b/app/views/master.blade.php
@@ -9,6 +9,20 @@
     
     <title>Invoice Ninja {{ isset($title) ? $title : '' }}</title>
 
+    <script src="{{ asset('js/jquery.js') }}" type="text/javascript"></script>  
+    <script type="text/javascript">
+    window.onerror = function(e) {
+      try {
+        $.ajax({
+          type: 'GET',
+          url: '{{ URL::to('log_error') }}',
+          data: 'error='+e+'&url='+window.location
+        });     
+      } catch(err) {}
+      return false;
+    }
+    </script>
+
     <!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries -->
     <!--[if lt IE 9]>
       <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
@@ -16,7 +30,6 @@
     <![endif]-->
     
     <!-- <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.js" type="text/javascript"></script>  -->
-    <script src="{{ asset('js/jquery.js') }}" type="text/javascript"></script>  
     <link rel="stylesheet" type="text/css" href="{{ asset('css/bootstrap.css') }}"/> 
 
 
diff --git a/app/views/payments/edit.blade.php b/app/views/payments/edit.blade.php
index ca8144f4b494..d7a84955ed46 100755
--- a/app/views/payments/edit.blade.php
+++ b/app/views/payments/edit.blade.php
@@ -13,13 +13,6 @@
 		'invoice' => 'required',		
   		'amount' => 'required',		
 	)); }}
-
-	@if ($payment)
-		{{-- Former::populate($payment) --}}
-	@else
-		{{ Former::populateField('payment_date', Utils::today()) }}
-	@endif
-
 	
 	<div class="row">
 		<div class="col-md-8">
@@ -57,19 +50,12 @@
 
 	$(function() {
 
-		@if ($clientPublicId)
-			$('select#client').val({{ $clientPublicId }});
-		@endif		
-		
-		populateInvoiceComboboxes();
+		populateInvoiceComboboxes({{ $clientPublicId }}, {{ $invoicePublicId }});
 
 		$('#currency_id').combobox();
 
-		$('#payment_date').datepicker({
-			autoclose: true,
-			todayHighlight: true,
-			keyboardNavigation: false
-		});
+		$('#payment_date').datepicker('update', new Date({{ strtotime(Utils::today()) * 1000 }}));
+
 	});
 
 	</script>
diff --git a/public/css/datepicker.css b/public/css/datepicker.css
index 03bd90d4ddf8..aa78b1d4b5b0 100755
--- a/public/css/datepicker.css
+++ b/public/css/datepicker.css
@@ -9,14 +9,11 @@
  */
 .datepicker {
   padding: 4px;
-  -webkit-border-radius: 4px;
-  -moz-border-radius: 4px;
   border-radius: 4px;
   direction: ltr;
   /*.dow {
 		border-top: 1px solid #ddd !important;
 	}*/
-
 }
 .datepicker-inline {
   width: 220px;
@@ -46,7 +43,7 @@
   display: inline-block;
   border-left: 6px solid transparent;
   border-right: 6px solid transparent;
-  border-bottom: 6px solid #ffffff;
+  border-bottom: 6px solid #fff;
   border-top: 0;
   position: absolute;
 }
@@ -76,7 +73,7 @@
 .datepicker-dropdown.datepicker-orient-bottom:after {
   bottom: -6px;
   border-bottom: 0;
-  border-top: 6px solid #ffffff;
+  border-top: 6px solid #fff;
 }
 .datepicker > div {
   display: none;
@@ -99,13 +96,11 @@
   -ms-user-select: none;
   user-select: none;
 }
-.datepicker td,
-.datepicker th {
+.datepicker table tr td,
+.datepicker table tr th {
   text-align: center;
-  width: 20px;
-  height: 20px;
-  -webkit-border-radius: 4px;
-  -moz-border-radius: 4px;
+  width: 30px;
+  height: 30px;
   border-radius: 4px;
   border: none;
 }
@@ -113,7 +108,8 @@
 .table-striped .datepicker table tr th {
   background-color: transparent;
 }
-.datepicker table tr td.day:hover {
+.datepicker table tr td.day:hover,
+.datepicker table tr td.day.focused {
   background: #eeeeee;
   cursor: pointer;
 }
@@ -131,24 +127,18 @@
 .datepicker table tr td.today:hover,
 .datepicker table tr td.today.disabled,
 .datepicker table tr td.today.disabled:hover {
-  background-color: #fde19a;
-  background-image: -moz-linear-gradient(top, #fdd49a, #fdf59a);
-  background-image: -ms-linear-gradient(top, #fdd49a, #fdf59a);
-  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#fdd49a), to(#fdf59a));
-  background-image: -webkit-linear-gradient(top, #fdd49a, #fdf59a);
-  background-image: -o-linear-gradient(top, #fdd49a, #fdf59a);
-  background-image: linear-gradient(top, #fdd49a, #fdf59a);
-  background-repeat: repeat-x;
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fdd49a', endColorstr='#fdf59a', GradientType=0);
-  border-color: #fdf59a #fdf59a #fbed50;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
-  color: #000;
+  color: #000000;
+  background-color: #ffdb99;
+  border-color: #ffb733;
 }
 .datepicker table tr td.today:hover,
 .datepicker table tr td.today:hover:hover,
 .datepicker table tr td.today.disabled:hover,
 .datepicker table tr td.today.disabled:hover:hover,
+.datepicker table tr td.today:focus,
+.datepicker table tr td.today:hover:focus,
+.datepicker table tr td.today.disabled:focus,
+.datepicker table tr td.today.disabled:hover:focus,
 .datepicker table tr td.today:active,
 .datepicker table tr td.today:hover:active,
 .datepicker table tr td.today.disabled:active,
@@ -157,15 +147,13 @@
 .datepicker table tr td.today:hover.active,
 .datepicker table tr td.today.disabled.active,
 .datepicker table tr td.today.disabled:hover.active,
-.datepicker table tr td.today.disabled,
-.datepicker table tr td.today:hover.disabled,
-.datepicker table tr td.today.disabled.disabled,
-.datepicker table tr td.today.disabled:hover.disabled,
-.datepicker table tr td.today[disabled],
-.datepicker table tr td.today:hover[disabled],
-.datepicker table tr td.today.disabled[disabled],
-.datepicker table tr td.today.disabled:hover[disabled] {
-  background-color: #fdf59a;
+.open .dropdown-toggle.datepicker table tr td.today,
+.open .dropdown-toggle.datepicker table tr td.today:hover,
+.open .dropdown-toggle.datepicker table tr td.today.disabled,
+.open .dropdown-toggle.datepicker table tr td.today.disabled:hover {
+  color: #000000;
+  background-color: #ffcd70;
+  border-color: #f59e00;
 }
 .datepicker table tr td.today:active,
 .datepicker table tr td.today:hover:active,
@@ -174,8 +162,75 @@
 .datepicker table tr td.today.active,
 .datepicker table tr td.today:hover.active,
 .datepicker table tr td.today.disabled.active,
-.datepicker table tr td.today.disabled:hover.active {
-  background-color: #fbf069 \9;
+.datepicker table tr td.today.disabled:hover.active,
+.open .dropdown-toggle.datepicker table tr td.today,
+.open .dropdown-toggle.datepicker table tr td.today:hover,
+.open .dropdown-toggle.datepicker table tr td.today.disabled,
+.open .dropdown-toggle.datepicker table tr td.today.disabled:hover {
+  background-image: none;
+}
+.datepicker table tr td.today.disabled,
+.datepicker table tr td.today:hover.disabled,
+.datepicker table tr td.today.disabled.disabled,
+.datepicker table tr td.today.disabled:hover.disabled,
+.datepicker table tr td.today[disabled],
+.datepicker table tr td.today:hover[disabled],
+.datepicker table tr td.today.disabled[disabled],
+.datepicker table tr td.today.disabled:hover[disabled],
+fieldset[disabled] .datepicker table tr td.today,
+fieldset[disabled] .datepicker table tr td.today:hover,
+fieldset[disabled] .datepicker table tr td.today.disabled,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover,
+.datepicker table tr td.today.disabled:hover,
+.datepicker table tr td.today:hover.disabled:hover,
+.datepicker table tr td.today.disabled.disabled:hover,
+.datepicker table tr td.today.disabled:hover.disabled:hover,
+.datepicker table tr td.today[disabled]:hover,
+.datepicker table tr td.today:hover[disabled]:hover,
+.datepicker table tr td.today.disabled[disabled]:hover,
+.datepicker table tr td.today.disabled:hover[disabled]:hover,
+fieldset[disabled] .datepicker table tr td.today:hover,
+fieldset[disabled] .datepicker table tr td.today:hover:hover,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover:hover,
+.datepicker table tr td.today.disabled:focus,
+.datepicker table tr td.today:hover.disabled:focus,
+.datepicker table tr td.today.disabled.disabled:focus,
+.datepicker table tr td.today.disabled:hover.disabled:focus,
+.datepicker table tr td.today[disabled]:focus,
+.datepicker table tr td.today:hover[disabled]:focus,
+.datepicker table tr td.today.disabled[disabled]:focus,
+.datepicker table tr td.today.disabled:hover[disabled]:focus,
+fieldset[disabled] .datepicker table tr td.today:focus,
+fieldset[disabled] .datepicker table tr td.today:hover:focus,
+fieldset[disabled] .datepicker table tr td.today.disabled:focus,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover:focus,
+.datepicker table tr td.today.disabled:active,
+.datepicker table tr td.today:hover.disabled:active,
+.datepicker table tr td.today.disabled.disabled:active,
+.datepicker table tr td.today.disabled:hover.disabled:active,
+.datepicker table tr td.today[disabled]:active,
+.datepicker table tr td.today:hover[disabled]:active,
+.datepicker table tr td.today.disabled[disabled]:active,
+.datepicker table tr td.today.disabled:hover[disabled]:active,
+fieldset[disabled] .datepicker table tr td.today:active,
+fieldset[disabled] .datepicker table tr td.today:hover:active,
+fieldset[disabled] .datepicker table tr td.today.disabled:active,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover:active,
+.datepicker table tr td.today.disabled.active,
+.datepicker table tr td.today:hover.disabled.active,
+.datepicker table tr td.today.disabled.disabled.active,
+.datepicker table tr td.today.disabled:hover.disabled.active,
+.datepicker table tr td.today[disabled].active,
+.datepicker table tr td.today:hover[disabled].active,
+.datepicker table tr td.today.disabled[disabled].active,
+.datepicker table tr td.today.disabled:hover[disabled].active,
+fieldset[disabled] .datepicker table tr td.today.active,
+fieldset[disabled] .datepicker table tr td.today:hover.active,
+fieldset[disabled] .datepicker table tr td.today.disabled.active,
+fieldset[disabled] .datepicker table tr td.today.disabled:hover.active {
+  background-color: #ffdb99;
+  border-color: #ffb733;
 }
 .datepicker table tr td.today:hover:hover {
   color: #000;
@@ -188,34 +243,25 @@
 .datepicker table tr td.range.disabled,
 .datepicker table tr td.range.disabled:hover {
   background: #eeeeee;
-  -webkit-border-radius: 0;
-  -moz-border-radius: 0;
   border-radius: 0;
 }
 .datepicker table tr td.range.today,
 .datepicker table tr td.range.today:hover,
 .datepicker table tr td.range.today.disabled,
 .datepicker table tr td.range.today.disabled:hover {
-  background-color: #f3d17a;
-  background-image: -moz-linear-gradient(top, #f3c17a, #f3e97a);
-  background-image: -ms-linear-gradient(top, #f3c17a, #f3e97a);
-  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#f3c17a), to(#f3e97a));
-  background-image: -webkit-linear-gradient(top, #f3c17a, #f3e97a);
-  background-image: -o-linear-gradient(top, #f3c17a, #f3e97a);
-  background-image: linear-gradient(top, #f3c17a, #f3e97a);
-  background-repeat: repeat-x;
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#f3c17a', endColorstr='#f3e97a', GradientType=0);
-  border-color: #f3e97a #f3e97a #edde34;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
-  -webkit-border-radius: 0;
-  -moz-border-radius: 0;
+  color: #000000;
+  background-color: #f7ca77;
+  border-color: #f1a417;
   border-radius: 0;
 }
 .datepicker table tr td.range.today:hover,
 .datepicker table tr td.range.today:hover:hover,
 .datepicker table tr td.range.today.disabled:hover,
 .datepicker table tr td.range.today.disabled:hover:hover,
+.datepicker table tr td.range.today:focus,
+.datepicker table tr td.range.today:hover:focus,
+.datepicker table tr td.range.today.disabled:focus,
+.datepicker table tr td.range.today.disabled:hover:focus,
 .datepicker table tr td.range.today:active,
 .datepicker table tr td.range.today:hover:active,
 .datepicker table tr td.range.today.disabled:active,
@@ -224,15 +270,13 @@
 .datepicker table tr td.range.today:hover.active,
 .datepicker table tr td.range.today.disabled.active,
 .datepicker table tr td.range.today.disabled:hover.active,
-.datepicker table tr td.range.today.disabled,
-.datepicker table tr td.range.today:hover.disabled,
-.datepicker table tr td.range.today.disabled.disabled,
-.datepicker table tr td.range.today.disabled:hover.disabled,
-.datepicker table tr td.range.today[disabled],
-.datepicker table tr td.range.today:hover[disabled],
-.datepicker table tr td.range.today.disabled[disabled],
-.datepicker table tr td.range.today.disabled:hover[disabled] {
-  background-color: #f3e97a;
+.open .dropdown-toggle.datepicker table tr td.range.today,
+.open .dropdown-toggle.datepicker table tr td.range.today:hover,
+.open .dropdown-toggle.datepicker table tr td.range.today.disabled,
+.open .dropdown-toggle.datepicker table tr td.range.today.disabled:hover {
+  color: #000000;
+  background-color: #f4bb51;
+  border-color: #bf800c;
 }
 .datepicker table tr td.range.today:active,
 .datepicker table tr td.range.today:hover:active,
@@ -241,32 +285,93 @@
 .datepicker table tr td.range.today.active,
 .datepicker table tr td.range.today:hover.active,
 .datepicker table tr td.range.today.disabled.active,
-.datepicker table tr td.range.today.disabled:hover.active {
-  background-color: #efe24b \9;
+.datepicker table tr td.range.today.disabled:hover.active,
+.open .dropdown-toggle.datepicker table tr td.range.today,
+.open .dropdown-toggle.datepicker table tr td.range.today:hover,
+.open .dropdown-toggle.datepicker table tr td.range.today.disabled,
+.open .dropdown-toggle.datepicker table tr td.range.today.disabled:hover {
+  background-image: none;
+}
+.datepicker table tr td.range.today.disabled,
+.datepicker table tr td.range.today:hover.disabled,
+.datepicker table tr td.range.today.disabled.disabled,
+.datepicker table tr td.range.today.disabled:hover.disabled,
+.datepicker table tr td.range.today[disabled],
+.datepicker table tr td.range.today:hover[disabled],
+.datepicker table tr td.range.today.disabled[disabled],
+.datepicker table tr td.range.today.disabled:hover[disabled],
+fieldset[disabled] .datepicker table tr td.range.today,
+fieldset[disabled] .datepicker table tr td.range.today:hover,
+fieldset[disabled] .datepicker table tr td.range.today.disabled,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover,
+.datepicker table tr td.range.today.disabled:hover,
+.datepicker table tr td.range.today:hover.disabled:hover,
+.datepicker table tr td.range.today.disabled.disabled:hover,
+.datepicker table tr td.range.today.disabled:hover.disabled:hover,
+.datepicker table tr td.range.today[disabled]:hover,
+.datepicker table tr td.range.today:hover[disabled]:hover,
+.datepicker table tr td.range.today.disabled[disabled]:hover,
+.datepicker table tr td.range.today.disabled:hover[disabled]:hover,
+fieldset[disabled] .datepicker table tr td.range.today:hover,
+fieldset[disabled] .datepicker table tr td.range.today:hover:hover,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover:hover,
+.datepicker table tr td.range.today.disabled:focus,
+.datepicker table tr td.range.today:hover.disabled:focus,
+.datepicker table tr td.range.today.disabled.disabled:focus,
+.datepicker table tr td.range.today.disabled:hover.disabled:focus,
+.datepicker table tr td.range.today[disabled]:focus,
+.datepicker table tr td.range.today:hover[disabled]:focus,
+.datepicker table tr td.range.today.disabled[disabled]:focus,
+.datepicker table tr td.range.today.disabled:hover[disabled]:focus,
+fieldset[disabled] .datepicker table tr td.range.today:focus,
+fieldset[disabled] .datepicker table tr td.range.today:hover:focus,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:focus,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover:focus,
+.datepicker table tr td.range.today.disabled:active,
+.datepicker table tr td.range.today:hover.disabled:active,
+.datepicker table tr td.range.today.disabled.disabled:active,
+.datepicker table tr td.range.today.disabled:hover.disabled:active,
+.datepicker table tr td.range.today[disabled]:active,
+.datepicker table tr td.range.today:hover[disabled]:active,
+.datepicker table tr td.range.today.disabled[disabled]:active,
+.datepicker table tr td.range.today.disabled:hover[disabled]:active,
+fieldset[disabled] .datepicker table tr td.range.today:active,
+fieldset[disabled] .datepicker table tr td.range.today:hover:active,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:active,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover:active,
+.datepicker table tr td.range.today.disabled.active,
+.datepicker table tr td.range.today:hover.disabled.active,
+.datepicker table tr td.range.today.disabled.disabled.active,
+.datepicker table tr td.range.today.disabled:hover.disabled.active,
+.datepicker table tr td.range.today[disabled].active,
+.datepicker table tr td.range.today:hover[disabled].active,
+.datepicker table tr td.range.today.disabled[disabled].active,
+.datepicker table tr td.range.today.disabled:hover[disabled].active,
+fieldset[disabled] .datepicker table tr td.range.today.active,
+fieldset[disabled] .datepicker table tr td.range.today:hover.active,
+fieldset[disabled] .datepicker table tr td.range.today.disabled.active,
+fieldset[disabled] .datepicker table tr td.range.today.disabled:hover.active {
+  background-color: #f7ca77;
+  border-color: #f1a417;
 }
 .datepicker table tr td.selected,
 .datepicker table tr td.selected:hover,
 .datepicker table tr td.selected.disabled,
 .datepicker table tr td.selected.disabled:hover {
-  background-color: #9e9e9e;
-  background-image: -moz-linear-gradient(top, #b3b3b3, #808080);
-  background-image: -ms-linear-gradient(top, #b3b3b3, #808080);
-  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#b3b3b3), to(#808080));
-  background-image: -webkit-linear-gradient(top, #b3b3b3, #808080);
-  background-image: -o-linear-gradient(top, #b3b3b3, #808080);
-  background-image: linear-gradient(top, #b3b3b3, #808080);
-  background-repeat: repeat-x;
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#b3b3b3', endColorstr='#808080', GradientType=0);
-  border-color: #808080 #808080 #595959;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
-  color: #fff;
+  color: #ffffff;
+  background-color: #999999;
+  border-color: #555555;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
 }
 .datepicker table tr td.selected:hover,
 .datepicker table tr td.selected:hover:hover,
 .datepicker table tr td.selected.disabled:hover,
 .datepicker table tr td.selected.disabled:hover:hover,
+.datepicker table tr td.selected:focus,
+.datepicker table tr td.selected:hover:focus,
+.datepicker table tr td.selected.disabled:focus,
+.datepicker table tr td.selected.disabled:hover:focus,
 .datepicker table tr td.selected:active,
 .datepicker table tr td.selected:hover:active,
 .datepicker table tr td.selected.disabled:active,
@@ -275,15 +380,13 @@
 .datepicker table tr td.selected:hover.active,
 .datepicker table tr td.selected.disabled.active,
 .datepicker table tr td.selected.disabled:hover.active,
-.datepicker table tr td.selected.disabled,
-.datepicker table tr td.selected:hover.disabled,
-.datepicker table tr td.selected.disabled.disabled,
-.datepicker table tr td.selected.disabled:hover.disabled,
-.datepicker table tr td.selected[disabled],
-.datepicker table tr td.selected:hover[disabled],
-.datepicker table tr td.selected.disabled[disabled],
-.datepicker table tr td.selected.disabled:hover[disabled] {
-  background-color: #808080;
+.open .dropdown-toggle.datepicker table tr td.selected,
+.open .dropdown-toggle.datepicker table tr td.selected:hover,
+.open .dropdown-toggle.datepicker table tr td.selected.disabled,
+.open .dropdown-toggle.datepicker table tr td.selected.disabled:hover {
+  color: #ffffff;
+  background-color: #858585;
+  border-color: #373737;
 }
 .datepicker table tr td.selected:active,
 .datepicker table tr td.selected:hover:active,
@@ -292,32 +395,93 @@
 .datepicker table tr td.selected.active,
 .datepicker table tr td.selected:hover.active,
 .datepicker table tr td.selected.disabled.active,
-.datepicker table tr td.selected.disabled:hover.active {
-  background-color: #666666 \9;
+.datepicker table tr td.selected.disabled:hover.active,
+.open .dropdown-toggle.datepicker table tr td.selected,
+.open .dropdown-toggle.datepicker table tr td.selected:hover,
+.open .dropdown-toggle.datepicker table tr td.selected.disabled,
+.open .dropdown-toggle.datepicker table tr td.selected.disabled:hover {
+  background-image: none;
+}
+.datepicker table tr td.selected.disabled,
+.datepicker table tr td.selected:hover.disabled,
+.datepicker table tr td.selected.disabled.disabled,
+.datepicker table tr td.selected.disabled:hover.disabled,
+.datepicker table tr td.selected[disabled],
+.datepicker table tr td.selected:hover[disabled],
+.datepicker table tr td.selected.disabled[disabled],
+.datepicker table tr td.selected.disabled:hover[disabled],
+fieldset[disabled] .datepicker table tr td.selected,
+fieldset[disabled] .datepicker table tr td.selected:hover,
+fieldset[disabled] .datepicker table tr td.selected.disabled,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover,
+.datepicker table tr td.selected.disabled:hover,
+.datepicker table tr td.selected:hover.disabled:hover,
+.datepicker table tr td.selected.disabled.disabled:hover,
+.datepicker table tr td.selected.disabled:hover.disabled:hover,
+.datepicker table tr td.selected[disabled]:hover,
+.datepicker table tr td.selected:hover[disabled]:hover,
+.datepicker table tr td.selected.disabled[disabled]:hover,
+.datepicker table tr td.selected.disabled:hover[disabled]:hover,
+fieldset[disabled] .datepicker table tr td.selected:hover,
+fieldset[disabled] .datepicker table tr td.selected:hover:hover,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover:hover,
+.datepicker table tr td.selected.disabled:focus,
+.datepicker table tr td.selected:hover.disabled:focus,
+.datepicker table tr td.selected.disabled.disabled:focus,
+.datepicker table tr td.selected.disabled:hover.disabled:focus,
+.datepicker table tr td.selected[disabled]:focus,
+.datepicker table tr td.selected:hover[disabled]:focus,
+.datepicker table tr td.selected.disabled[disabled]:focus,
+.datepicker table tr td.selected.disabled:hover[disabled]:focus,
+fieldset[disabled] .datepicker table tr td.selected:focus,
+fieldset[disabled] .datepicker table tr td.selected:hover:focus,
+fieldset[disabled] .datepicker table tr td.selected.disabled:focus,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover:focus,
+.datepicker table tr td.selected.disabled:active,
+.datepicker table tr td.selected:hover.disabled:active,
+.datepicker table tr td.selected.disabled.disabled:active,
+.datepicker table tr td.selected.disabled:hover.disabled:active,
+.datepicker table tr td.selected[disabled]:active,
+.datepicker table tr td.selected:hover[disabled]:active,
+.datepicker table tr td.selected.disabled[disabled]:active,
+.datepicker table tr td.selected.disabled:hover[disabled]:active,
+fieldset[disabled] .datepicker table tr td.selected:active,
+fieldset[disabled] .datepicker table tr td.selected:hover:active,
+fieldset[disabled] .datepicker table tr td.selected.disabled:active,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover:active,
+.datepicker table tr td.selected.disabled.active,
+.datepicker table tr td.selected:hover.disabled.active,
+.datepicker table tr td.selected.disabled.disabled.active,
+.datepicker table tr td.selected.disabled:hover.disabled.active,
+.datepicker table tr td.selected[disabled].active,
+.datepicker table tr td.selected:hover[disabled].active,
+.datepicker table tr td.selected.disabled[disabled].active,
+.datepicker table tr td.selected.disabled:hover[disabled].active,
+fieldset[disabled] .datepicker table tr td.selected.active,
+fieldset[disabled] .datepicker table tr td.selected:hover.active,
+fieldset[disabled] .datepicker table tr td.selected.disabled.active,
+fieldset[disabled] .datepicker table tr td.selected.disabled:hover.active {
+  background-color: #999999;
+  border-color: #555555;
 }
 .datepicker table tr td.active,
 .datepicker table tr td.active:hover,
 .datepicker table tr td.active.disabled,
 .datepicker table tr td.active.disabled:hover {
-  background-color: #006dcc;
-  background-image: -moz-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -ms-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0044cc));
-  background-image: -webkit-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -o-linear-gradient(top, #0088cc, #0044cc);
-  background-image: linear-gradient(top, #0088cc, #0044cc);
-  background-repeat: repeat-x;
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#0088cc', endColorstr='#0044cc', GradientType=0);
-  border-color: #0044cc #0044cc #002a80;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
-  color: #fff;
+  color: #ffffff;
+  background-color: #428bca;
+  border-color: #357ebd;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
 }
 .datepicker table tr td.active:hover,
 .datepicker table tr td.active:hover:hover,
 .datepicker table tr td.active.disabled:hover,
 .datepicker table tr td.active.disabled:hover:hover,
+.datepicker table tr td.active:focus,
+.datepicker table tr td.active:hover:focus,
+.datepicker table tr td.active.disabled:focus,
+.datepicker table tr td.active.disabled:hover:focus,
 .datepicker table tr td.active:active,
 .datepicker table tr td.active:hover:active,
 .datepicker table tr td.active.disabled:active,
@@ -326,15 +490,13 @@
 .datepicker table tr td.active:hover.active,
 .datepicker table tr td.active.disabled.active,
 .datepicker table tr td.active.disabled:hover.active,
-.datepicker table tr td.active.disabled,
-.datepicker table tr td.active:hover.disabled,
-.datepicker table tr td.active.disabled.disabled,
-.datepicker table tr td.active.disabled:hover.disabled,
-.datepicker table tr td.active[disabled],
-.datepicker table tr td.active:hover[disabled],
-.datepicker table tr td.active.disabled[disabled],
-.datepicker table tr td.active.disabled:hover[disabled] {
-  background-color: #0044cc;
+.open .dropdown-toggle.datepicker table tr td.active,
+.open .dropdown-toggle.datepicker table tr td.active:hover,
+.open .dropdown-toggle.datepicker table tr td.active.disabled,
+.open .dropdown-toggle.datepicker table tr td.active.disabled:hover {
+  color: #ffffff;
+  background-color: #3276b1;
+  border-color: #285e8e;
 }
 .datepicker table tr td.active:active,
 .datepicker table tr td.active:hover:active,
@@ -343,8 +505,75 @@
 .datepicker table tr td.active.active,
 .datepicker table tr td.active:hover.active,
 .datepicker table tr td.active.disabled.active,
-.datepicker table tr td.active.disabled:hover.active {
-  background-color: #003399 \9;
+.datepicker table tr td.active.disabled:hover.active,
+.open .dropdown-toggle.datepicker table tr td.active,
+.open .dropdown-toggle.datepicker table tr td.active:hover,
+.open .dropdown-toggle.datepicker table tr td.active.disabled,
+.open .dropdown-toggle.datepicker table tr td.active.disabled:hover {
+  background-image: none;
+}
+.datepicker table tr td.active.disabled,
+.datepicker table tr td.active:hover.disabled,
+.datepicker table tr td.active.disabled.disabled,
+.datepicker table tr td.active.disabled:hover.disabled,
+.datepicker table tr td.active[disabled],
+.datepicker table tr td.active:hover[disabled],
+.datepicker table tr td.active.disabled[disabled],
+.datepicker table tr td.active.disabled:hover[disabled],
+fieldset[disabled] .datepicker table tr td.active,
+fieldset[disabled] .datepicker table tr td.active:hover,
+fieldset[disabled] .datepicker table tr td.active.disabled,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover,
+.datepicker table tr td.active.disabled:hover,
+.datepicker table tr td.active:hover.disabled:hover,
+.datepicker table tr td.active.disabled.disabled:hover,
+.datepicker table tr td.active.disabled:hover.disabled:hover,
+.datepicker table tr td.active[disabled]:hover,
+.datepicker table tr td.active:hover[disabled]:hover,
+.datepicker table tr td.active.disabled[disabled]:hover,
+.datepicker table tr td.active.disabled:hover[disabled]:hover,
+fieldset[disabled] .datepicker table tr td.active:hover,
+fieldset[disabled] .datepicker table tr td.active:hover:hover,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover:hover,
+.datepicker table tr td.active.disabled:focus,
+.datepicker table tr td.active:hover.disabled:focus,
+.datepicker table tr td.active.disabled.disabled:focus,
+.datepicker table tr td.active.disabled:hover.disabled:focus,
+.datepicker table tr td.active[disabled]:focus,
+.datepicker table tr td.active:hover[disabled]:focus,
+.datepicker table tr td.active.disabled[disabled]:focus,
+.datepicker table tr td.active.disabled:hover[disabled]:focus,
+fieldset[disabled] .datepicker table tr td.active:focus,
+fieldset[disabled] .datepicker table tr td.active:hover:focus,
+fieldset[disabled] .datepicker table tr td.active.disabled:focus,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover:focus,
+.datepicker table tr td.active.disabled:active,
+.datepicker table tr td.active:hover.disabled:active,
+.datepicker table tr td.active.disabled.disabled:active,
+.datepicker table tr td.active.disabled:hover.disabled:active,
+.datepicker table tr td.active[disabled]:active,
+.datepicker table tr td.active:hover[disabled]:active,
+.datepicker table tr td.active.disabled[disabled]:active,
+.datepicker table tr td.active.disabled:hover[disabled]:active,
+fieldset[disabled] .datepicker table tr td.active:active,
+fieldset[disabled] .datepicker table tr td.active:hover:active,
+fieldset[disabled] .datepicker table tr td.active.disabled:active,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover:active,
+.datepicker table tr td.active.disabled.active,
+.datepicker table tr td.active:hover.disabled.active,
+.datepicker table tr td.active.disabled.disabled.active,
+.datepicker table tr td.active.disabled:hover.disabled.active,
+.datepicker table tr td.active[disabled].active,
+.datepicker table tr td.active:hover[disabled].active,
+.datepicker table tr td.active.disabled[disabled].active,
+.datepicker table tr td.active.disabled:hover[disabled].active,
+fieldset[disabled] .datepicker table tr td.active.active,
+fieldset[disabled] .datepicker table tr td.active:hover.active,
+fieldset[disabled] .datepicker table tr td.active.disabled.active,
+fieldset[disabled] .datepicker table tr td.active.disabled:hover.active {
+  background-color: #428bca;
+  border-color: #357ebd;
 }
 .datepicker table tr td span {
   display: block;
@@ -354,8 +583,6 @@
   float: left;
   margin: 1%;
   cursor: pointer;
-  -webkit-border-radius: 4px;
-  -moz-border-radius: 4px;
   border-radius: 4px;
 }
 .datepicker table tr td span:hover {
@@ -371,25 +598,19 @@
 .datepicker table tr td span.active:hover,
 .datepicker table tr td span.active.disabled,
 .datepicker table tr td span.active.disabled:hover {
-  background-color: #006dcc;
-  background-image: -moz-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -ms-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0044cc));
-  background-image: -webkit-linear-gradient(top, #0088cc, #0044cc);
-  background-image: -o-linear-gradient(top, #0088cc, #0044cc);
-  background-image: linear-gradient(top, #0088cc, #0044cc);
-  background-repeat: repeat-x;
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#0088cc', endColorstr='#0044cc', GradientType=0);
-  border-color: #0044cc #0044cc #002a80;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);
-  color: #fff;
+  color: #ffffff;
+  background-color: #428bca;
+  border-color: #357ebd;
   text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
 }
 .datepicker table tr td span.active:hover,
 .datepicker table tr td span.active:hover:hover,
 .datepicker table tr td span.active.disabled:hover,
 .datepicker table tr td span.active.disabled:hover:hover,
+.datepicker table tr td span.active:focus,
+.datepicker table tr td span.active:hover:focus,
+.datepicker table tr td span.active.disabled:focus,
+.datepicker table tr td span.active.disabled:hover:focus,
 .datepicker table tr td span.active:active,
 .datepicker table tr td span.active:hover:active,
 .datepicker table tr td span.active.disabled:active,
@@ -398,15 +619,13 @@
 .datepicker table tr td span.active:hover.active,
 .datepicker table tr td span.active.disabled.active,
 .datepicker table tr td span.active.disabled:hover.active,
-.datepicker table tr td span.active.disabled,
-.datepicker table tr td span.active:hover.disabled,
-.datepicker table tr td span.active.disabled.disabled,
-.datepicker table tr td span.active.disabled:hover.disabled,
-.datepicker table tr td span.active[disabled],
-.datepicker table tr td span.active:hover[disabled],
-.datepicker table tr td span.active.disabled[disabled],
-.datepicker table tr td span.active.disabled:hover[disabled] {
-  background-color: #0044cc;
+.open .dropdown-toggle.datepicker table tr td span.active,
+.open .dropdown-toggle.datepicker table tr td span.active:hover,
+.open .dropdown-toggle.datepicker table tr td span.active.disabled,
+.open .dropdown-toggle.datepicker table tr td span.active.disabled:hover {
+  color: #ffffff;
+  background-color: #3276b1;
+  border-color: #285e8e;
 }
 .datepicker table tr td span.active:active,
 .datepicker table tr td span.active:hover:active,
@@ -415,8 +634,75 @@
 .datepicker table tr td span.active.active,
 .datepicker table tr td span.active:hover.active,
 .datepicker table tr td span.active.disabled.active,
-.datepicker table tr td span.active.disabled:hover.active {
-  background-color: #003399 \9;
+.datepicker table tr td span.active.disabled:hover.active,
+.open .dropdown-toggle.datepicker table tr td span.active,
+.open .dropdown-toggle.datepicker table tr td span.active:hover,
+.open .dropdown-toggle.datepicker table tr td span.active.disabled,
+.open .dropdown-toggle.datepicker table tr td span.active.disabled:hover {
+  background-image: none;
+}
+.datepicker table tr td span.active.disabled,
+.datepicker table tr td span.active:hover.disabled,
+.datepicker table tr td span.active.disabled.disabled,
+.datepicker table tr td span.active.disabled:hover.disabled,
+.datepicker table tr td span.active[disabled],
+.datepicker table tr td span.active:hover[disabled],
+.datepicker table tr td span.active.disabled[disabled],
+.datepicker table tr td span.active.disabled:hover[disabled],
+fieldset[disabled] .datepicker table tr td span.active,
+fieldset[disabled] .datepicker table tr td span.active:hover,
+fieldset[disabled] .datepicker table tr td span.active.disabled,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover,
+.datepicker table tr td span.active.disabled:hover,
+.datepicker table tr td span.active:hover.disabled:hover,
+.datepicker table tr td span.active.disabled.disabled:hover,
+.datepicker table tr td span.active.disabled:hover.disabled:hover,
+.datepicker table tr td span.active[disabled]:hover,
+.datepicker table tr td span.active:hover[disabled]:hover,
+.datepicker table tr td span.active.disabled[disabled]:hover,
+.datepicker table tr td span.active.disabled:hover[disabled]:hover,
+fieldset[disabled] .datepicker table tr td span.active:hover,
+fieldset[disabled] .datepicker table tr td span.active:hover:hover,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover:hover,
+.datepicker table tr td span.active.disabled:focus,
+.datepicker table tr td span.active:hover.disabled:focus,
+.datepicker table tr td span.active.disabled.disabled:focus,
+.datepicker table tr td span.active.disabled:hover.disabled:focus,
+.datepicker table tr td span.active[disabled]:focus,
+.datepicker table tr td span.active:hover[disabled]:focus,
+.datepicker table tr td span.active.disabled[disabled]:focus,
+.datepicker table tr td span.active.disabled:hover[disabled]:focus,
+fieldset[disabled] .datepicker table tr td span.active:focus,
+fieldset[disabled] .datepicker table tr td span.active:hover:focus,
+fieldset[disabled] .datepicker table tr td span.active.disabled:focus,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover:focus,
+.datepicker table tr td span.active.disabled:active,
+.datepicker table tr td span.active:hover.disabled:active,
+.datepicker table tr td span.active.disabled.disabled:active,
+.datepicker table tr td span.active.disabled:hover.disabled:active,
+.datepicker table tr td span.active[disabled]:active,
+.datepicker table tr td span.active:hover[disabled]:active,
+.datepicker table tr td span.active.disabled[disabled]:active,
+.datepicker table tr td span.active.disabled:hover[disabled]:active,
+fieldset[disabled] .datepicker table tr td span.active:active,
+fieldset[disabled] .datepicker table tr td span.active:hover:active,
+fieldset[disabled] .datepicker table tr td span.active.disabled:active,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover:active,
+.datepicker table tr td span.active.disabled.active,
+.datepicker table tr td span.active:hover.disabled.active,
+.datepicker table tr td span.active.disabled.disabled.active,
+.datepicker table tr td span.active.disabled:hover.disabled.active,
+.datepicker table tr td span.active[disabled].active,
+.datepicker table tr td span.active:hover[disabled].active,
+.datepicker table tr td span.active.disabled[disabled].active,
+.datepicker table tr td span.active.disabled:hover[disabled].active,
+fieldset[disabled] .datepicker table tr td span.active.active,
+fieldset[disabled] .datepicker table tr td span.active:hover.active,
+fieldset[disabled] .datepicker table tr td span.active.disabled.active,
+fieldset[disabled] .datepicker table tr td span.active.disabled:hover.active {
+  background-color: #428bca;
+  border-color: #357ebd;
 }
 .datepicker table tr td span.old,
 .datepicker table tr td span.new {
@@ -443,9 +729,7 @@
   cursor: default;
   background-color: transparent;
 }
-.input-append.date .add-on i,
-.input-prepend.date .add-on i {
-  display: block;
+.input-group.date .input-group-addon i {
   cursor: pointer;
   width: 16px;
   height: 16px;
@@ -454,28 +738,53 @@
   text-align: center;
 }
 .input-daterange input:first-child {
-  -webkit-border-radius: 3px 0 0 3px;
-  -moz-border-radius: 3px 0 0 3px;
   border-radius: 3px 0 0 3px;
 }
 .input-daterange input:last-child {
-  -webkit-border-radius: 0 3px 3px 0;
-  -moz-border-radius: 0 3px 3px 0;
   border-radius: 0 3px 3px 0;
 }
-.input-daterange .add-on {
-  display: inline-block;
+.input-daterange .input-group-addon {
   width: auto;
   min-width: 16px;
-  height: 18px;
   padding: 4px 5px;
   font-weight: normal;
-  line-height: 18px;
+  line-height: 1.428571429;
   text-align: center;
-  text-shadow: 0 1px 0 #ffffff;
+  text-shadow: 0 1px 0 #fff;
   vertical-align: middle;
   background-color: #eeeeee;
-  border: 1px solid #ccc;
+  border: solid #cccccc;
+  border-width: 1px 0;
   margin-left: -5px;
   margin-right: -5px;
 }
+.datepicker.dropdown-menu {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  z-index: 1000;
+  float: left;
+  display: none;
+  min-width: 160px;
+  list-style: none;
+  background-color: #ffffff;
+  border: 1px solid #ccc;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-radius: 5px;
+  -webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
+  -moz-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
+  -webkit-background-clip: padding-box;
+  -moz-background-clip: padding;
+  background-clip: padding-box;
+  *border-right-width: 2px;
+  *border-bottom-width: 2px;
+  color: #333333;
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+  font-size: 13px;
+  line-height: 1.428571429;
+}
+.datepicker.dropdown-menu th,
+.datepicker.dropdown-menu td {
+  padding: 4px 5px;
+}
diff --git a/public/js/script.js b/public/js/script.js
index f05e32fb207f..522a81e2146e 100755
--- a/public/js/script.js
+++ b/public/js/script.js
@@ -665,7 +665,6 @@ ko.bindingHandlers.dropdown = {
 };
 
 
-/*
 ko.bindingHandlers.datePicker = {
     init: function (element, valueAccessor, allBindingsAccessor) {
        var value = ko.utils.unwrapObservable(valueAccessor());       
@@ -678,7 +677,6 @@ ko.bindingHandlers.datePicker = {
        console.log("datePicker-init: %s", value);
     }    
 };
-*/
 
 
 function wordWrapText(value, width)
@@ -724,11 +722,11 @@ function getClientDisplayName(client)
 }
 
 
-function populateInvoiceComboboxes() {
+function populateInvoiceComboboxes(clientId, invoiceId) {
 	var clientMap = {};
 	var invoiceMap = {};
 	var invoicesForClientMap = {};
-	var $input = $('select#client');		
+	var $clientSelect = $('select#client');		
 	
 	for (var i=0; i<invoices.length; i++) {
 		var invoice = invoices[i];
@@ -747,14 +745,18 @@ function populateInvoiceComboboxes() {
 		clientMap[client.public_id] = client;
 	}
 
-	$input.append(new Option('', ''));	
+	$clientSelect.append(new Option('', ''));	
 	for (var i=0; i<clients.length; i++) {
 		var client = clients[i];
-		$input.append(new Option(getClientDisplayName(client), client.public_id));
+		$clientSelect.append(new Option(getClientDisplayName(client), client.public_id));
 	}	
 
-	$input.combobox();
-	$input.on('change', function(e) {						
+	if (clientId) {
+		$clientSelect.val(clientId);
+	}
+
+	$clientSelect.combobox();
+	$clientSelect.on('change', function(e) {						
 		console.log('client change');
 		var clientId = $('input[name=client]').val();
 		var invoiceId = $('input[name=invoice]').val();						
@@ -775,9 +777,9 @@ function populateInvoiceComboboxes() {
 			$invoiceCombobox.append(new Option(invoice.invoice_number + ' - ' + getClientDisplayName(client) + ' - ' + formatMoney(invoice.balance, invoice.currency_id),  invoice.public_id));
 		}
 		$('select#invoice').combobox('refresh');
-	}).trigger('change');
+	});
 
-	var $input = $('select#invoice').on('change', function(e) {			
+	var $invoiceSelect = $('select#invoice').on('change', function(e) {			
 		$clientCombobox = $('select#client');
 		var invoiceId = $('input[name=invoice]').val();						
 		if (invoiceId) {
@@ -789,7 +791,21 @@ function populateInvoiceComboboxes() {
 			}
 		}
 	});
-	$input.combobox();	
+
+	$invoiceSelect.combobox();	
+
+	if (invoiceId) {
+		var invoice = invoiceMap[invoiceId];
+		var client = clientMap[invoice.client.public_id];
+		setComboboxValue($('.invoice-select'), invoice.public_id, (invoice.invoice_number + ' - ' + getClientDisplayName(client) + ' - ' + formatMoney(invoice.balance, invoice.currency_id)));
+		$invoiceSelect.trigger('change');
+	} else if (clientId) {
+		var client = clientMap[clientId];
+		setComboboxValue($('.client-select'), client.public_id, getClientDisplayName(client));
+		$clientSelect.trigger('change');
+	} else {
+		$clientSelect.trigger('change');
+	}	
 }
 
 
@@ -799,3 +815,6 @@ CONSTS.INVOICE_STATUS_SENT = 2;
 CONSTS.INVOICE_STATUS_VIEWED = 3;
 CONSTS.INVOICE_STATUS_PARTIAL = 4;
 CONSTS.INVOICE_STATUS_PAID = 5;
+
+$.fn.datepicker.defaults.autoclose = true;
+$.fn.datepicker.defaults.todayHighlight = true;
\ No newline at end of file
diff --git a/public/js/underscore-min.map b/public/js/underscore-min.map
new file mode 100755
index 000000000000..4fbe0ba3c992
--- /dev/null
+++ b/public/js/underscore-min.map
@@ -0,0 +1 @@
+{"version":3,"file":"underscore-min.js","sources":["underscore.js"],"names":["root","this","previousUnderscore","_","breaker","ArrayProto","Array","prototype","ObjProto","Object","FuncProto","Function","push","slice","concat","toString","hasOwnProperty","nativeForEach","forEach","nativeMap","map","nativeReduce","reduce","nativeReduceRight","reduceRight","nativeFilter","filter","nativeEvery","every","nativeSome","some","nativeIndexOf","indexOf","nativeLastIndexOf","lastIndexOf","nativeIsArray","isArray","nativeKeys","keys","nativeBind","bind","obj","_wrapped","exports","module","VERSION","each","iterator","context","length","i","call","collect","results","value","index","list","reduceError","foldl","inject","memo","initial","arguments","TypeError","foldr","find","detect","result","any","select","reject","all","identity","contains","include","target","invoke","method","args","isFunc","isFunction","apply","pluck","key","where","attrs","first","isEmpty","findWhere","max","Math","Infinity","computed","min","shuffle","rand","shuffled","random","sample","n","guard","lookupIterator","sortBy","criteria","sort","left","right","a","b","group","behavior","groupBy","has","indexBy","countBy","sortedIndex","array","low","high","mid","toArray","values","size","head","take","last","rest","tail","drop","compact","flatten","input","shallow","output","isArguments","without","difference","uniq","unique","isSorted","seen","union","intersection","item","other","zip","object","from","hasIndex","range","start","stop","step","ceil","idx","ctor","func","bound","self","partial","bindAll","funcs","Error","f","memoize","hasher","delay","wait","setTimeout","defer","throttle","options","timeout","previous","later","leading","Date","now","remaining","clearTimeout","trailing","debounce","immediate","timestamp","callNow","once","ran","wrap","wrapper","compose","after","times","pairs","invert","functions","methods","names","extend","source","prop","pick","copy","omit","defaults","clone","isObject","tap","interceptor","eq","aStack","bStack","className","String","global","multiline","ignoreCase","aCtor","constructor","bCtor","pop","isEqual","isString","isElement","nodeType","name","isFinite","isNaN","parseFloat","isNumber","isBoolean","isNull","isUndefined","noConflict","accum","floor","entityMap","escape","&","<",">","\"","'","unescape","entityRegexes","RegExp","join","string","replace","match","property","mixin","idCounter","uniqueId","prefix","id","templateSettings","evaluate","interpolate","noMatch","escapes","\\","\r","\n","\t","
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\ No newline at end of file
diff --git a/public/js/underscore.js b/public/js/underscore.js
new file mode 100755
index 000000000000..7625e24618a9
--- /dev/null
+++ b/public/js/underscore.js
@@ -0,0 +1,1322 @@
+//     Underscore.js 1.5.2
+//     http://underscorejs.org
+//     (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+//     Underscore may be freely distributed under the MIT license.
+
+(function() {
+
+  // Baseline setup
+  // --------------
+
+  // Establish the root object, `window` in the browser, or `exports` on the server.
+  var root = this;
+
+  // Save the previous value of the `_` variable.
+  var previousUnderscore = root._;
+
+  // Establish the object that gets returned to break out of a loop iteration.
+  var breaker = {};
+
+  // Save bytes in the minified (but not gzipped) version:
+  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
+
+  //use the faster Date.now if available.
+  var getTime = (Date.now || function() {
+    return new Date().getTime();
+  });
+
+  // Create quick reference variables for speed access to core prototypes.
+  var
+    push             = ArrayProto.push,
+    slice            = ArrayProto.slice,
+    concat           = ArrayProto.concat,
+    toString         = ObjProto.toString,
+    hasOwnProperty   = ObjProto.hasOwnProperty;
+
+  // All **ECMAScript 5** native function implementations that we hope to use
+  // are declared here.
+  var
+    nativeForEach      = ArrayProto.forEach,
+    nativeMap          = ArrayProto.map,
+    nativeReduce       = ArrayProto.reduce,
+    nativeReduceRight  = ArrayProto.reduceRight,
+    nativeFilter       = ArrayProto.filter,
+    nativeEvery        = ArrayProto.every,
+    nativeSome         = ArrayProto.some,
+    nativeIndexOf      = ArrayProto.indexOf,
+    nativeLastIndexOf  = ArrayProto.lastIndexOf,
+    nativeIsArray      = Array.isArray,
+    nativeKeys         = Object.keys,
+    nativeBind         = FuncProto.bind;
+
+  // Create a safe reference to the Underscore object for use below.
+  var _ = function(obj) {
+    if (obj instanceof _) return obj;
+    if (!(this instanceof _)) return new _(obj);
+    this._wrapped = obj;
+  };
+
+  // Export the Underscore object for **Node.js**, with
+  // backwards-compatibility for the old `require()` API. If we're in
+  // the browser, add `_` as a global object via a string identifier,
+  // for Closure Compiler "advanced" mode.
+  if (typeof exports !== 'undefined') {
+    if (typeof module !== 'undefined' && module.exports) {
+      exports = module.exports = _;
+    }
+    exports._ = _;
+  } else {
+    root._ = _;
+  }
+
+  // Current version.
+  _.VERSION = '1.5.2';
+
+  // Collection Functions
+  // --------------------
+
+  // The cornerstone, an `each` implementation, aka `forEach`.
+  // Handles objects with the built-in `forEach`, arrays, and raw objects.
+  // Delegates to **ECMAScript 5**'s native `forEach` if available.
+  var each = _.each = _.forEach = function(obj, iterator, context) {
+    if (obj == null) return;
+    if (nativeForEach && obj.forEach === nativeForEach) {
+      obj.forEach(iterator, context);
+    } else if (obj.length === +obj.length) {
+      for (var i = 0, length = obj.length; i < length; i++) {
+        if (iterator.call(context, obj[i], i, obj) === breaker) return;
+      }
+    } else {
+      var keys = _.keys(obj);
+      for (var i = 0, length = keys.length; i < length; i++) {
+        if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
+      }
+    }
+  };
+
+  // Return the results of applying the iterator to each element.
+  // Delegates to **ECMAScript 5**'s native `map` if available.
+  _.map = _.collect = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
+    each(obj, function(value, index, list) {
+      results.push(iterator.call(context, value, index, list));
+    });
+    return results;
+  };
+
+  var reduceError = 'Reduce of empty array with no initial value';
+
+  // **Reduce** builds up a single result from a list of values, aka `inject`,
+  // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
+  _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduce && obj.reduce === nativeReduce) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
+    }
+    each(obj, function(value, index, list) {
+      if (!initial) {
+        memo = value;
+        initial = true;
+      } else {
+        memo = iterator.call(context, memo, value, index, list);
+      }
+    });
+    if (!initial) throw new TypeError(reduceError);
+    return memo;
+  };
+
+  // The right-associative version of reduce, also known as `foldr`.
+  // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
+  _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
+    }
+    var length = obj.length;
+    if (length !== +length) {
+      var keys = _.keys(obj);
+      length = keys.length;
+    }
+    each(obj, function(value, index, list) {
+      index = keys ? keys[--length] : --length;
+      if (!initial) {
+        memo = obj[index];
+        initial = true;
+      } else {
+        memo = iterator.call(context, memo, obj[index], index, list);
+      }
+    });
+    if (!initial) throw new TypeError(reduceError);
+    return memo;
+  };
+
+  // Return the first value which passes a truth test. Aliased as `detect`.
+  _.find = _.detect = function(obj, iterator, context) {
+    var result;
+    any(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) {
+        result = value;
+        return true;
+      }
+    });
+    return result;
+  };
+
+  // Return all the elements that pass a truth test.
+  // Delegates to **ECMAScript 5**'s native `filter` if available.
+  // Aliased as `select`.
+  _.filter = _.select = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
+    each(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) results.push(value);
+    });
+    return results;
+  };
+
+  // Return all the elements for which a truth test fails.
+  _.reject = function(obj, iterator, context) {
+    return _.filter(obj, function(value, index, list) {
+      return !iterator.call(context, value, index, list);
+    }, context);
+  };
+
+  // Determine whether all of the elements match a truth test.
+  // Delegates to **ECMAScript 5**'s native `every` if available.
+  // Aliased as `all`.
+  _.every = _.all = function(obj, iterator, context) {
+    iterator || (iterator = _.identity);
+    var result = true;
+    if (obj == null) return result;
+    if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
+    each(obj, function(value, index, list) {
+      if (!(result = result && iterator.call(context, value, index, list))) return breaker;
+    });
+    return !!result;
+  };
+
+  // Determine if at least one element in the object matches a truth test.
+  // Delegates to **ECMAScript 5**'s native `some` if available.
+  // Aliased as `any`.
+  var any = _.some = _.any = function(obj, iterator, context) {
+    iterator || (iterator = _.identity);
+    var result = false;
+    if (obj == null) return result;
+    if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
+    each(obj, function(value, index, list) {
+      if (result || (result = iterator.call(context, value, index, list))) return breaker;
+    });
+    return !!result;
+  };
+
+  // Determine if the array or object contains a given value (using `===`).
+  // Aliased as `include`.
+  _.contains = _.include = function(obj, target) {
+    if (obj == null) return false;
+    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
+    return any(obj, function(value) {
+      return value === target;
+    });
+  };
+
+  // Invoke a method (with arguments) on every item in a collection.
+  _.invoke = function(obj, method) {
+    var args = slice.call(arguments, 2);
+    var isFunc = _.isFunction(method);
+    return _.map(obj, function(value) {
+      return (isFunc ? method : value[method]).apply(value, args);
+    });
+  };
+
+  // Convenience version of a common use case of `map`: fetching a property.
+  _.pluck = function(obj, key) {
+    return _.map(obj, _.property(key));
+  };
+
+  // Convenience version of a common use case of `filter`: selecting only objects
+  // containing specific `key:value` pairs.
+  _.where = function(obj, attrs, first) {
+    if (_.isEmpty(attrs)) return first ? void 0 : [];
+    return _[first ? 'find' : 'filter'](obj, function(value) {
+      for (var key in attrs) {
+        if (attrs[key] !== value[key]) return false;
+      }
+      return true;
+    });
+  };
+
+  // Convenience version of a common use case of `find`: getting the first object
+  // containing specific `key:value` pairs.
+  _.findWhere = function(obj, attrs) {
+    return _.where(obj, attrs, true);
+  };
+
+  // Return the maximum element or (element-based computation).
+  // Can't optimize arrays of integers longer than 65,535 elements.
+  // See [WebKit Bug 80797](https://bugs.webkit.org/show_bug.cgi?id=80797)
+  _.max = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
+      return Math.max.apply(Math, obj);
+    }
+    if (!iterator && _.isEmpty(obj)) return -Infinity;
+    var result = {computed : -Infinity, value: -Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed > result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Return the minimum element (or element-based computation).
+  _.min = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) {
+      return Math.min.apply(Math, obj);
+    }
+    if (!iterator && _.isEmpty(obj)) return Infinity;
+    var result = {computed : Infinity, value: Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed < result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Shuffle an array, using the modern version of the
+  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
+  _.shuffle = function(obj) {
+    var rand;
+    var index = 0;
+    var shuffled = [];
+    each(obj, function(value) {
+      rand = _.random(index++);
+      shuffled[index - 1] = shuffled[rand];
+      shuffled[rand] = value;
+    });
+    return shuffled;
+  };
+
+  // Sample **n** random values from a collection.
+  // If **n** is not specified, returns a single random element.
+  // The internal `guard` argument allows it to work with `map`.
+  _.sample = function(obj, n, guard) {
+    if (n == null || guard) {
+      if (obj.length !== +obj.length) obj = _.values(obj);
+      return obj[_.random(obj.length - 1)];
+    }
+    return _.shuffle(obj).slice(0, Math.max(0, n));
+  };
+
+  // An internal function to generate lookup iterators.
+  var lookupIterator = function(value) {
+    if (value == null) return _.identity;
+    if (_.isFunction(value)) return value;
+    return _.property(value);
+  };
+
+  // Sort the object's values by a criterion produced by an iterator.
+  _.sortBy = function(obj, iterator, context) {
+    iterator = lookupIterator(iterator);
+    return _.pluck(_.map(obj, function(value, index, list) {
+      return {
+        value: value,
+        index: index,
+        criteria: iterator.call(context, value, index, list)
+      };
+    }).sort(function(left, right) {
+      var a = left.criteria;
+      var b = right.criteria;
+      if (a !== b) {
+        if (a > b || a === void 0) return 1;
+        if (a < b || b === void 0) return -1;
+      }
+      return left.index - right.index;
+    }), 'value');
+  };
+
+  // An internal function used for aggregate "group by" operations.
+  var group = function(behavior) {
+    return function(obj, iterator, context) {
+      var result = {};
+      iterator = lookupIterator(iterator);
+      each(obj, function(value, index) {
+        var key = iterator.call(context, value, index, obj);
+        behavior(result, key, value);
+      });
+      return result;
+    };
+  };
+
+  // Groups the object's values by a criterion. Pass either a string attribute
+  // to group by, or a function that returns the criterion.
+  _.groupBy = group(function(result, key, value) {
+    (_.has(result, key) ? result[key] : (result[key] = [])).push(value);
+  });
+
+  // Indexes the object's values by a criterion, similar to `groupBy`, but for
+  // when you know that your index values will be unique.
+  _.indexBy = group(function(result, key, value) {
+    result[key] = value;
+  });
+
+  // Counts instances of an object that group by a certain criterion. Pass
+  // either a string attribute to count by, or a function that returns the
+  // criterion.
+  _.countBy = group(function(result, key) {
+    _.has(result, key) ? result[key]++ : result[key] = 1;
+  });
+
+  // Use a comparator function to figure out the smallest index at which
+  // an object should be inserted so as to maintain order. Uses binary search.
+  _.sortedIndex = function(array, obj, iterator, context) {
+    iterator = lookupIterator(iterator);
+    var value = iterator.call(context, obj);
+    var low = 0, high = array.length;
+    while (low < high) {
+      var mid = (low + high) >>> 1;
+      iterator.call(context, array[mid]) < value ? low = mid + 1 : high = mid;
+    }
+    return low;
+  };
+
+  // Safely create a real, live array from anything iterable.
+  _.toArray = function(obj) {
+    if (!obj) return [];
+    if (_.isArray(obj)) return slice.call(obj);
+    if (obj.length === +obj.length) return _.map(obj, _.identity);
+    return _.values(obj);
+  };
+
+  // Return the number of elements in an object.
+  _.size = function(obj) {
+    if (obj == null) return 0;
+    return (obj.length === +obj.length) ? obj.length : _.keys(obj).length;
+  };
+
+  // Array Functions
+  // ---------------
+
+  // Get the first element of an array. Passing **n** will return the first N
+  // values in the array. Aliased as `head` and `take`. The **guard** check
+  // allows it to work with `_.map`.
+  _.first = _.head = _.take = function(array, n, guard) {
+    if (array == null) return void 0;
+    if ((n == null) || guard) return array[0];
+    if (n < 0) return [];
+    return slice.call(array, 0, n);
+  };
+
+  // Returns everything but the last entry of the array. Especially useful on
+  // the arguments object. Passing **n** will return all the values in
+  // the array, excluding the last N. The **guard** check allows it to work with
+  // `_.map`.
+  _.initial = function(array, n, guard) {
+    return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
+  };
+
+  // Get the last element of an array. Passing **n** will return the last N
+  // values in the array. The **guard** check allows it to work with `_.map`.
+  _.last = function(array, n, guard) {
+    if (array == null) return void 0;
+    if ((n == null) || guard) return array[array.length - 1];
+    return slice.call(array, Math.max(array.length - n, 0));
+  };
+
+  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
+  // Especially useful on the arguments object. Passing an **n** will return
+  // the rest N values in the array. The **guard**
+  // check allows it to work with `_.map`.
+  _.rest = _.tail = _.drop = function(array, n, guard) {
+    return slice.call(array, (n == null) || guard ? 1 : n);
+  };
+
+  // Trim out all falsy values from an array.
+  _.compact = function(array) {
+    return _.filter(array, _.identity);
+  };
+
+  // Internal implementation of a recursive `flatten` function.
+  var flatten = function(input, shallow, output) {
+    if (shallow && _.every(input, _.isArray)) {
+      return concat.apply(output, input);
+    }
+    each(input, function(value) {
+      if (_.isArray(value) || _.isArguments(value)) {
+        shallow ? push.apply(output, value) : flatten(value, shallow, output);
+      } else {
+        output.push(value);
+      }
+    });
+    return output;
+  };
+
+  // Flatten out an array, either recursively (by default), or just one level.
+  _.flatten = function(array, shallow) {
+    return flatten(array, shallow, []);
+  };
+
+  // Return a version of the array that does not contain the specified value(s).
+  _.without = function(array) {
+    return _.difference(array, slice.call(arguments, 1));
+  };
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  // Aliased as `unique`.
+  _.uniq = _.unique = function(array, isSorted, iterator, context) {
+    if (_.isFunction(isSorted)) {
+      context = iterator;
+      iterator = isSorted;
+      isSorted = false;
+    }
+    var initial = iterator ? _.map(array, iterator, context) : array;
+    var results = [];
+    var seen = [];
+    each(initial, function(value, index) {
+      if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) {
+        seen.push(value);
+        results.push(array[index]);
+      }
+    });
+    return results;
+  };
+
+  // Produce an array that contains the union: each distinct element from all of
+  // the passed-in arrays.
+  _.union = function() {
+    return _.uniq(_.flatten(arguments, true));
+  };
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays.
+  _.intersection = function(array) {
+    var rest = slice.call(arguments, 1);
+    return _.filter(_.uniq(array), function(item) {
+      return _.every(rest, function(other) {
+        return _.indexOf(other, item) >= 0;
+      });
+    });
+  };
+
+  // Take the difference between one array and a number of other arrays.
+  // Only the elements present in just the first array will remain.
+  _.difference = function(array) {
+    var rest = concat.apply(ArrayProto, slice.call(arguments, 1));
+    return _.filter(array, function(value){ return !_.contains(rest, value); });
+  };
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  _.zip = function() {
+    var length = _.max(_.pluck(arguments, "length").concat(0));
+    var results = new Array(length);
+    for (var i = 0; i < length; i++) {
+      results[i] = _.pluck(arguments, '' + i);
+    }
+    return results;
+  };
+
+  // Converts lists into objects. Pass either a single array of `[key, value]`
+  // pairs, or two parallel arrays of the same length -- one of keys, and one of
+  // the corresponding values.
+  _.object = function(list, values) {
+    if (list == null) return {};
+    var result = {};
+    for (var i = 0, length = list.length; i < length; i++) {
+      if (values) {
+        result[list[i]] = values[i];
+      } else {
+        result[list[i][0]] = list[i][1];
+      }
+    }
+    return result;
+  };
+
+  // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
+  // we need this function. Return the position of the first occurrence of an
+  // item in an array, or -1 if the item is not included in the array.
+  // Delegates to **ECMAScript 5**'s native `indexOf` if available.
+  // If the array is large and already in sort order, pass `true`
+  // for **isSorted** to use binary search.
+  _.indexOf = function(array, item, isSorted) {
+    if (array == null) return -1;
+    var i = 0, length = array.length;
+    if (isSorted) {
+      if (typeof isSorted == 'number') {
+        i = (isSorted < 0 ? Math.max(0, length + isSorted) : isSorted);
+      } else {
+        i = _.sortedIndex(array, item);
+        return array[i] === item ? i : -1;
+      }
+    }
+    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted);
+    for (; i < length; i++) if (array[i] === item) return i;
+    return -1;
+  };
+
+  // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
+  _.lastIndexOf = function(array, item, from) {
+    if (array == null) return -1;
+    var hasIndex = from != null;
+    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) {
+      return hasIndex ? array.lastIndexOf(item, from) : array.lastIndexOf(item);
+    }
+    var i = (hasIndex ? from : array.length);
+    while (i--) if (array[i] === item) return i;
+    return -1;
+  };
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python `range()` function. See
+  // [the Python documentation](http://docs.python.org/library/functions.html#range).
+  _.range = function(start, stop, step) {
+    if (arguments.length <= 1) {
+      stop = start || 0;
+      start = 0;
+    }
+    step = arguments[2] || 1;
+
+    var length = Math.max(Math.ceil((stop - start) / step), 0);
+    var idx = 0;
+    var range = new Array(length);
+
+    while(idx < length) {
+      range[idx++] = start;
+      start += step;
+    }
+
+    return range;
+  };
+
+  // Function (ahem) Functions
+  // ------------------
+
+  // Reusable constructor function for prototype setting.
+  var ctor = function(){};
+
+  // Create a function bound to a given object (assigning `this`, and arguments,
+  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
+  // available.
+  _.bind = function(func, context) {
+    var args, bound;
+    if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
+    if (!_.isFunction(func)) throw new TypeError;
+    args = slice.call(arguments, 2);
+    return bound = function() {
+      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
+      ctor.prototype = func.prototype;
+      var self = new ctor;
+      ctor.prototype = null;
+      var result = func.apply(self, args.concat(slice.call(arguments)));
+      if (Object(result) === result) return result;
+      return self;
+    };
+  };
+
+  // Partially apply a function by creating a version that has had some of its
+  // arguments pre-filled, without changing its dynamic `this` context. _ acts
+  // as a placeholder, allowing any combination of arguments to be pre-filled.
+  _.partial = function(func) {
+    var boundArgs = slice.call(arguments, 1);
+    return function() {
+      var args = slice.call(boundArgs);
+      _.each(arguments, function(arg) {
+        var index = args.indexOf(_);
+        args[index >= 0 ? index : args.length] = arg;
+      });
+      return func.apply(this, _.map(args, function(value) {
+        return value === _ ? void 0 : value;
+      }));
+    };
+  };
+
+  // Bind a number of an object's methods to that object. Remaining arguments
+  // are the method names to be bound. Useful for ensuring that all callbacks
+  // defined on an object belong to it.
+  _.bindAll = function(obj) {
+    var funcs = slice.call(arguments, 1);
+    if (funcs.length === 0) throw new Error("bindAll must be passed function names");
+    each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
+    return obj;
+  };
+
+  // Memoize an expensive function by storing its results.
+  _.memoize = function(func, hasher) {
+    var memo = {};
+    hasher || (hasher = _.identity);
+    return function() {
+      var key = hasher.apply(this, arguments);
+      return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
+    };
+  };
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  _.delay = function(func, wait) {
+    var args = slice.call(arguments, 2);
+    return setTimeout(function(){ return func.apply(null, args); }, wait);
+  };
+
+  // Defers a function, scheduling it to run after the current call stack has
+  // cleared.
+  _.defer = function(func) {
+    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
+  };
+
+  // Returns a function, that, when invoked, will only be triggered at most once
+  // during a given window of time. Normally, the throttled function will run
+  // as much as it can, without ever going more than once per `wait` duration;
+  // but if you'd like to disable the execution on the leading edge, pass
+  // `{leading: false}`. To disable execution on the trailing edge, ditto.
+  _.throttle = function(func, wait, options) {
+    var context, args, result;
+    var timeout = null;
+    var previous = 0;
+    options || (options = {});
+    var later = function() {
+      previous = options.leading === false ? 0 : getTime();
+      timeout = null;
+      result = func.apply(context, args);
+      context = args = null;
+    };
+    return function() {
+      var now = getTime();
+      if (!previous && options.leading === false) previous = now;
+      var remaining = wait - (now - previous);
+      context = this;
+      args = arguments;
+      if (remaining <= 0) {
+        clearTimeout(timeout);
+        timeout = null;
+        previous = now;
+        result = func.apply(context, args);
+        context = args = null;
+      } else if (!timeout && options.trailing !== false) {
+        timeout = setTimeout(later, remaining);
+      }
+      return result;
+    };
+  };
+
+  // Returns a function, that, as long as it continues to be invoked, will not
+  // be triggered. The function will be called after it stops being called for
+  // N milliseconds. If `immediate` is passed, trigger the function on the
+  // leading edge, instead of the trailing.
+  _.debounce = function(func, wait, immediate) {
+    var timeout, args, context, timestamp, result;
+    return function() {
+      context = this;
+      args = arguments;
+      timestamp = getTime();
+      var later = function() {
+        var last = getTime() - timestamp;
+        if (last < wait) {
+          timeout = setTimeout(later, wait - last);
+        } else {
+          timeout = null;
+          if (!immediate) {
+            result = func.apply(context, args);
+            context = args = null;
+          }
+        }
+      };
+      var callNow = immediate && !timeout;
+      if (!timeout) {
+        timeout = setTimeout(later, wait);
+      }
+      if (callNow) {
+        result = func.apply(context, args);
+        context = args = null;
+      }
+
+      return result;
+    };
+  };
+
+  // Returns a function that will be executed at most one time, no matter how
+  // often you call it. Useful for lazy initialization.
+  _.once = function(func) {
+    var ran = false, memo;
+    return function() {
+      if (ran) return memo;
+      ran = true;
+      memo = func.apply(this, arguments);
+      func = null;
+      return memo;
+    };
+  };
+
+  // Returns the first function passed as an argument to the second,
+  // allowing you to adjust arguments, run code before and after, and
+  // conditionally execute the original function.
+  _.wrap = function(func, wrapper) {
+    return _.partial(wrapper, func);
+  };
+
+  // Returns a function that is the composition of a list of functions, each
+  // consuming the return value of the function that follows.
+  _.compose = function() {
+    var funcs = arguments;
+    return function() {
+      var args = arguments;
+      for (var i = funcs.length - 1; i >= 0; i--) {
+        args = [funcs[i].apply(this, args)];
+      }
+      return args[0];
+    };
+  };
+
+  // Returns a function that will only be executed after being called N times.
+  _.after = function(times, func) {
+    return function() {
+      if (--times < 1) {
+        return func.apply(this, arguments);
+      }
+    };
+  };
+
+  // Object Functions
+  // ----------------
+
+  // Retrieve the names of an object's properties.
+  // Delegates to **ECMAScript 5**'s native `Object.keys`
+  _.keys = nativeKeys || function(obj) {
+    if (obj !== Object(obj)) throw new TypeError('Invalid object');
+    var keys = [];
+    for (var key in obj) if (_.has(obj, key)) keys.push(key);
+    return keys;
+  };
+
+  // Retrieve the values of an object's properties.
+  _.values = function(obj) {
+    var keys = _.keys(obj);
+    var length = keys.length;
+    var values = new Array(length);
+    for (var i = 0; i < length; i++) {
+      values[i] = obj[keys[i]];
+    }
+    return values;
+  };
+
+  // Convert an object into a list of `[key, value]` pairs.
+  _.pairs = function(obj) {
+    var keys = _.keys(obj);
+    var length = keys.length;
+    var pairs = new Array(length);
+    for (var i = 0; i < length; i++) {
+      pairs[i] = [keys[i], obj[keys[i]]];
+    }
+    return pairs;
+  };
+
+  // Invert the keys and values of an object. The values must be serializable.
+  _.invert = function(obj) {
+    var result = {};
+    var keys = _.keys(obj);
+    for (var i = 0, length = keys.length; i < length; i++) {
+      result[obj[keys[i]]] = keys[i];
+    }
+    return result;
+  };
+
+  // Return a sorted list of the function names available on the object.
+  // Aliased as `methods`
+  _.functions = _.methods = function(obj) {
+    var names = [];
+    for (var key in obj) {
+      if (_.isFunction(obj[key])) names.push(key);
+    }
+    return names.sort();
+  };
+
+  // Extend a given object with all the properties in passed-in object(s).
+  _.extend = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      if (source) {
+        for (var prop in source) {
+          obj[prop] = source[prop];
+        }
+      }
+    });
+    return obj;
+  };
+
+  // Return a copy of the object only containing the whitelisted properties.
+  _.pick = function(obj) {
+    var copy = {};
+    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
+    each(keys, function(key) {
+      if (key in obj) copy[key] = obj[key];
+    });
+    return copy;
+  };
+
+   // Return a copy of the object without the blacklisted properties.
+  _.omit = function(obj) {
+    var copy = {};
+    var keys = concat.apply(ArrayProto, slice.call(arguments, 1));
+    for (var key in obj) {
+      if (!_.contains(keys, key)) copy[key] = obj[key];
+    }
+    return copy;
+  };
+
+  // Fill in a given object with default properties.
+  _.defaults = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      if (source) {
+        for (var prop in source) {
+          if (obj[prop] === void 0) obj[prop] = source[prop];
+        }
+      }
+    });
+    return obj;
+  };
+
+  // Create a (shallow-cloned) duplicate of an object.
+  _.clone = function(obj) {
+    if (!_.isObject(obj)) return obj;
+    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
+  };
+
+  // Invokes interceptor with the obj, and then returns obj.
+  // The primary purpose of this method is to "tap into" a method chain, in
+  // order to perform operations on intermediate results within the chain.
+  _.tap = function(obj, interceptor) {
+    interceptor(obj);
+    return obj;
+  };
+
+  // Internal recursive comparison function for `isEqual`.
+  var eq = function(a, b, aStack, bStack) {
+    // Identical objects are equal. `0 === -0`, but they aren't identical.
+    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
+    if (a === b) return a !== 0 || 1 / a == 1 / b;
+    // A strict comparison is necessary because `null == undefined`.
+    if (a == null || b == null) return a === b;
+    // Unwrap any wrapped objects.
+    if (a instanceof _) a = a._wrapped;
+    if (b instanceof _) b = b._wrapped;
+    // Compare `[[Class]]` names.
+    var className = toString.call(a);
+    if (className != toString.call(b)) return false;
+    switch (className) {
+      // Strings, numbers, dates, and booleans are compared by value.
+      case '[object String]':
+        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
+        // equivalent to `new String("5")`.
+        return a == String(b);
+      case '[object Number]':
+        // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
+        // other numeric values.
+        return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
+      case '[object Date]':
+      case '[object Boolean]':
+        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
+        // millisecond representations. Note that invalid dates with millisecond representations
+        // of `NaN` are not equivalent.
+        return +a == +b;
+      // RegExps are compared by their source patterns and flags.
+      case '[object RegExp]':
+        return a.source == b.source &&
+               a.global == b.global &&
+               a.multiline == b.multiline &&
+               a.ignoreCase == b.ignoreCase;
+    }
+    if (typeof a != 'object' || typeof b != 'object') return false;
+    // Assume equality for cyclic structures. The algorithm for detecting cyclic
+    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+    var length = aStack.length;
+    while (length--) {
+      // Linear search. Performance is inversely proportional to the number of
+      // unique nested structures.
+      if (aStack[length] == a) return bStack[length] == b;
+    }
+    // Objects with different constructors are not equivalent, but `Object`s
+    // from different frames are.
+    var aCtor = a.constructor, bCtor = b.constructor;
+    if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) &&
+                             _.isFunction(bCtor) && (bCtor instanceof bCtor))
+                        && ('constructor' in a && 'constructor' in b)) {
+      return false;
+    }
+    // Add the first object to the stack of traversed objects.
+    aStack.push(a);
+    bStack.push(b);
+    var size = 0, result = true;
+    // Recursively compare objects and arrays.
+    if (className == '[object Array]') {
+      // Compare array lengths to determine if a deep comparison is necessary.
+      size = a.length;
+      result = size == b.length;
+      if (result) {
+        // Deep compare the contents, ignoring non-numeric properties.
+        while (size--) {
+          if (!(result = eq(a[size], b[size], aStack, bStack))) break;
+        }
+      }
+    } else {
+      // Deep compare objects.
+      for (var key in a) {
+        if (_.has(a, key)) {
+          // Count the expected number of properties.
+          size++;
+          // Deep compare each member.
+          if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break;
+        }
+      }
+      // Ensure that both objects contain the same number of properties.
+      if (result) {
+        for (key in b) {
+          if (_.has(b, key) && !(size--)) break;
+        }
+        result = !size;
+      }
+    }
+    // Remove the first object from the stack of traversed objects.
+    aStack.pop();
+    bStack.pop();
+    return result;
+  };
+
+  // Perform a deep comparison to check if two objects are equal.
+  _.isEqual = function(a, b) {
+    return eq(a, b, [], []);
+  };
+
+  // Is a given array, string, or object empty?
+  // An "empty" object has no enumerable own-properties.
+  _.isEmpty = function(obj) {
+    if (obj == null) return true;
+    if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
+    for (var key in obj) if (_.has(obj, key)) return false;
+    return true;
+  };
+
+  // Is a given value a DOM element?
+  _.isElement = function(obj) {
+    return !!(obj && obj.nodeType === 1);
+  };
+
+  // Is a given value an array?
+  // Delegates to ECMA5's native Array.isArray
+  _.isArray = nativeIsArray || function(obj) {
+    return toString.call(obj) == '[object Array]';
+  };
+
+  // Is a given variable an object?
+  _.isObject = function(obj) {
+    return obj === Object(obj);
+  };
+
+  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp.
+  each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) {
+    _['is' + name] = function(obj) {
+      return toString.call(obj) == '[object ' + name + ']';
+    };
+  });
+
+  // Define a fallback version of the method in browsers (ahem, IE), where
+  // there isn't any inspectable "Arguments" type.
+  if (!_.isArguments(arguments)) {
+    _.isArguments = function(obj) {
+      return !!(obj && _.has(obj, 'callee'));
+    };
+  }
+
+  // Optimize `isFunction` if appropriate.
+  if (typeof (/./) !== 'function') {
+    _.isFunction = function(obj) {
+      return typeof obj === 'function';
+    };
+  }
+
+  // Is a given object a finite number?
+  _.isFinite = function(obj) {
+    return isFinite(obj) && !isNaN(parseFloat(obj));
+  };
+
+  // Is the given value `NaN`? (NaN is the only number which does not equal itself).
+  _.isNaN = function(obj) {
+    return _.isNumber(obj) && obj != +obj;
+  };
+
+  // Is a given value a boolean?
+  _.isBoolean = function(obj) {
+    return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
+  };
+
+  // Is a given value equal to null?
+  _.isNull = function(obj) {
+    return obj === null;
+  };
+
+  // Is a given variable undefined?
+  _.isUndefined = function(obj) {
+    return obj === void 0;
+  };
+
+  // Shortcut function for checking if an object has a given property directly
+  // on itself (in other words, not on a prototype).
+  _.has = function(obj, key) {
+    return hasOwnProperty.call(obj, key);
+  };
+
+  // Utility Functions
+  // -----------------
+
+  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
+  // previous owner. Returns a reference to the Underscore object.
+  _.noConflict = function() {
+    root._ = previousUnderscore;
+    return this;
+  };
+
+  // Keep the identity function around for default iterators.
+  _.identity = function(value) {
+    return value;
+  };
+
+  _.constant = function(value) {
+    return function () {
+      return value;
+    };
+  };
+
+  _.property = function(key) {
+    return function(obj) {
+      return obj[key];
+    };
+  };
+
+  // Run a function **n** times.
+  _.times = function(n, iterator, context) {
+    var accum = Array(Math.max(0, n));
+    for (var i = 0; i < n; i++) accum[i] = iterator.call(context, i);
+    return accum;
+  };
+
+  // Return a random integer between min and max (inclusive).
+  _.random = function(min, max) {
+    if (max == null) {
+      max = min;
+      min = 0;
+    }
+    return min + Math.floor(Math.random() * (max - min + 1));
+  };
+
+  // List of HTML entities for escaping.
+  var entityMap = {
+    escape: {
+      '&': '&amp;',
+      '<': '&lt;',
+      '>': '&gt;',
+      '"': '&quot;',
+      "'": '&#x27;'
+    }
+  };
+  entityMap.unescape = _.invert(entityMap.escape);
+
+  // Regexes containing the keys and values listed immediately above.
+  var entityRegexes = {
+    escape:   new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'),
+    unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g')
+  };
+
+  // Functions for escaping and unescaping strings to/from HTML interpolation.
+  _.each(['escape', 'unescape'], function(method) {
+    _[method] = function(string) {
+      if (string == null) return '';
+      return ('' + string).replace(entityRegexes[method], function(match) {
+        return entityMap[method][match];
+      });
+    };
+  });
+
+  // If the value of the named `property` is a function then invoke it with the
+  // `object` as context; otherwise, return it.
+  _.result = function(object, property) {
+    if (object == null) return void 0;
+    var value = object[property];
+    return _.isFunction(value) ? value.call(object) : value;
+  };
+
+  // Add your own custom functions to the Underscore object.
+  _.mixin = function(obj) {
+    each(_.functions(obj), function(name) {
+      var func = _[name] = obj[name];
+      _.prototype[name] = function() {
+        var args = [this._wrapped];
+        push.apply(args, arguments);
+        return result.call(this, func.apply(_, args));
+      };
+    });
+  };
+
+  // Generate a unique integer id (unique within the entire client session).
+  // Useful for temporary DOM ids.
+  var idCounter = 0;
+  _.uniqueId = function(prefix) {
+    var id = ++idCounter + '';
+    return prefix ? prefix + id : id;
+  };
+
+  // By default, Underscore uses ERB-style template delimiters, change the
+  // following template settings to use alternative delimiters.
+  _.templateSettings = {
+    evaluate    : /<%([\s\S]+?)%>/g,
+    interpolate : /<%=([\s\S]+?)%>/g,
+    escape      : /<%-([\s\S]+?)%>/g
+  };
+
+  // When customizing `templateSettings`, if you don't want to define an
+  // interpolation, evaluation or escaping regex, we need one that is
+  // guaranteed not to match.
+  var noMatch = /(.)^/;
+
+  // Certain characters need to be escaped so that they can be put into a
+  // string literal.
+  var escapes = {
+    "'":      "'",
+    '\\':     '\\',
+    '\r':     'r',
+    '\n':     'n',
+    '\t':     't',
+    '\u2028': 'u2028',
+    '\u2029': 'u2029'
+  };
+
+  var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g;
+
+  // JavaScript micro-templating, similar to John Resig's implementation.
+  // Underscore templating handles arbitrary delimiters, preserves whitespace,
+  // and correctly escapes quotes within interpolated code.
+  _.template = function(text, data, settings) {
+    var render;
+    settings = _.defaults({}, settings, _.templateSettings);
+
+    // Combine delimiters into one regular expression via alternation.
+    var matcher = new RegExp([
+      (settings.escape || noMatch).source,
+      (settings.interpolate || noMatch).source,
+      (settings.evaluate || noMatch).source
+    ].join('|') + '|$', 'g');
+
+    // Compile the template source, escaping string literals appropriately.
+    var index = 0;
+    var source = "__p+='";
+    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
+      source += text.slice(index, offset)
+        .replace(escaper, function(match) { return '\\' + escapes[match]; });
+
+      if (escape) {
+        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
+      }
+      if (interpolate) {
+        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
+      }
+      if (evaluate) {
+        source += "';\n" + evaluate + "\n__p+='";
+      }
+      index = offset + match.length;
+      return match;
+    });
+    source += "';\n";
+
+    // If a variable is not specified, place data values in local scope.
+    if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
+
+    source = "var __t,__p='',__j=Array.prototype.join," +
+      "print=function(){__p+=__j.call(arguments,'');};\n" +
+      source + "return __p;\n";
+
+    try {
+      render = new Function(settings.variable || 'obj', '_', source);
+    } catch (e) {
+      e.source = source;
+      throw e;
+    }
+
+    if (data) return render(data, _);
+    var template = function(data) {
+      return render.call(this, data, _);
+    };
+
+    // Provide the compiled function source as a convenience for precompilation.
+    template.source = 'function(' + (settings.variable || 'obj') + '){\n' + source + '}';
+
+    return template;
+  };
+
+  // Add a "chain" function, which will delegate to the wrapper.
+  _.chain = function(obj) {
+    return _(obj).chain();
+  };
+
+  // OOP
+  // ---------------
+  // If Underscore is called as a function, it returns a wrapped object that
+  // can be used OO-style. This wrapper holds altered versions of all the
+  // underscore functions. Wrapped objects may be chained.
+
+  // Helper function to continue chaining intermediate results.
+  var result = function(obj) {
+    return this._chain ? _(obj).chain() : obj;
+  };
+
+  // Add all of the Underscore functions to the wrapper object.
+  _.mixin(_);
+
+  // Add all mutator Array functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = ArrayProto[name];
+    _.prototype[name] = function() {
+      var obj = this._wrapped;
+      method.apply(obj, arguments);
+      if ((name == 'shift' || name == 'splice') && obj.length === 0) delete obj[0];
+      return result.call(this, obj);
+    };
+  });
+
+  // Add all accessor Array functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
+    var method = ArrayProto[name];
+    _.prototype[name] = function() {
+      return result.call(this, method.apply(this._wrapped, arguments));
+    };
+  });
+
+  _.extend(_.prototype, {
+
+    // Start chaining a wrapped Underscore object.
+    chain: function() {
+      this._chain = true;
+      return this;
+    },
+
+    // Extracts the result from a wrapped and chained object.
+    value: function() {
+      return this._wrapped;
+    }
+
+  });
+
+  // AMD registration happens at the end for compatibility with AMD loaders
+  // that may not enforce next-turn semantics on modules. Even though general
+  // practice for AMD registration is to be anonymous, underscore registers
+  // as a named module because, like jQuery, it is a base library that is
+  // popular enough to be bundled in a third party lib, but not be part of
+  // an AMD load request. Those cases could generate an error when an
+  // anonymous define() is called outside of a loader request.
+  if (typeof define === 'function' && define.amd) {
+    define('underscore', [], function() {
+      return _;
+    });
+  }
+}).call(this);