Update src/jquery.multiselect.filter.js

Fixed error menu is undefined error on line 32. Changed .data('multiselect'); to .data('echMultiselect');
Added var _self = this; on line 62 of the toggleChecked override function so that the options in the original select get modified when checks get toggled.

Author: davidworkman9

src/jquery.multiselect.filter.js

@@ -29,7 +29,7 @@
       var opts = this.options;
 
       // get the multiselect instance
-      var instance = (this.instance = $(this.element).data('multiselect'));
+      var instance = (this.instance = $(this.element).data('echMultiselect'));
 
       // store header; add filter class so the close/check all/uncheck all links can be positioned correctly
       var header = (this.header = instance.menu.find('.ui-multiselect-header').addClass('ui-multiselect-hasfilter'));
@@ -59,6 +59,7 @@
       // only the currently filtered elements are checked
       instance._toggleChecked = function(flag, group) {
         var $inputs = (group && group.length) ?  group : this.labels.find('input');
+        var _self = this;
 
         // do not include hidden elems if the menu isn't open.
         var selector = instance._isOpen ?  ':disabled, :hidden' : ':disabled';