Fix memory leaks.

 - MultiSelect: Form events not being unbound on destroy.
 - Filter: Document events not being unbound on destroy.
 - Filter: Removed circular reference that prevented garbage collection.

Have not updated minified javascript!

Author: liazy

src/jquery.multiselect.filter.js

@@ -63,7 +63,7 @@
         var _self = this;
 
         // do not include hidden elems if the menu isn't open.
-        var selector = instance._isOpen ?  ':disabled, :hidden' : ':disabled';
+        var selector = _self._isOpen ?  ':disabled, :hidden' : ':disabled';
 
         $inputs = $inputs
           .not(selector)
@@ -91,14 +91,14 @@
       };
 
       // rebuild cache when multiselect is updated
-      var doc = $(document).bind('multiselectrefresh', $.proxy(function() {
+      var doc = $(document).bind('multiselectrefresh.'+ instance._namespaceID, $.proxy(function() {
         this.updateCache();
         this._handler();
       }, this));
 
       // automatically reset the widget on close?
       if(this.options.autoReset) {
-        doc.bind('multiselectclose', $.proxy(this._reset, this));
+        doc.bind('multiselectclose.'+ instance._namespaceID, $.proxy(this._reset, this));
       }
     },
 

src/jquery.multiselect.js

@@ -417,7 +417,7 @@
       // restored to their defaultValue prop on form reset, and the reset
       // handler fires before the form is actually reset.  delaying it a bit
       // gives the form inputs time to clear.
-      $(this.element[0].form).bind('reset.multiselect', function() {
+      $(this.element[0].form).bind('reset.' + this._namespaceID, function() {
         setTimeout($.proxy(self.refresh, self), 10);
       });
     },
@@ -644,6 +644,7 @@
 
       // unbind events
       $doc.unbind(this._namespaceID);
+      $(this.element[0].form).unbind(this._namespaceID);
 
       this.button.remove();
       this.menu.remove();