rewrote the way Evt.bind works + added Evt.unbind

core.js

@@ -361,7 +361,7 @@
      * Wrapper for .addEventListener and .attachEvent.
      */
 
-    Yeti.Evt.bind = function(el, type, listener, capture) {
+    Yeti.Evt.bind = function(obj, type, listener, capture) {
         if ((type.substr(0,2).toLowerCase()) == 'on') {
             type = type.substr(2);
         }
@@ -370,28 +370,57 @@
             capture = false;
         }
 
-        if (el.addEventListener){
-            el.addEventListener(type, listener, capture);
-        } else if (el.attachEvent) {
-            /* In IE events always bubble, no capturing possibility. */
-            el.attachEvent('on' + type, listener);
-/*
-            var _type = 'on' + type;
+        if (obj.addEventListener) {
+            obj.addEventListener(type, listener, capture);
+        } else if (obj.attachEvent) {
+            obj['__e' + type + listener] = listener;
+
+            obj[type + listener] = function() { 
+                obj['__e' + type + listener](window.event); 
+            }
 
-            if (el[_type] === null) {
-                el[_type] = listener;
+            obj.attachEvent('on' + type, obj[type + listener] );
         } else {
-                el[_type] = function() {
-                    el[_type](); listener();
+            ;
+        }
+    }
+
+    /* Yeti.Evt.unbind
+     * Wrapper for .removeEventListener and .detachEvent.
+     */
+
+    Yeti.Evt.unbind = function(obj, type, listener, capture) {
+        if ((type.substr(0,2).toLowerCase()) == 'on') {
+            type = type.substr(2);
         }
+
+        if (typeof(capture) != 'boolean') {
+            capture = false;
+        }
+
+        if (obj.removeEventListener) {
+            obj.removeEventListener(type, listener, capture);
+        } else if (obj.detachEvent) {
+            obj.detachEvent('on' + type, obj[type + listener]);
+
+            // Prevent a memory leak in IE.
+            try {
+                // Check if delete is supported
+                if (delete({})) {
+                    delete(obj[type + listener]);
+                    delete(obj['__e' + type + listener]);
+                } else {
+                    throw "delete";
+                };
+            } catch(e) {
+                obj[type + listener] = null;
+                obj['__e' + type + listener] = null;
             }
-*/
         } else {
             ;
         }
     }
 
-
     /***********************************************************************
         DOM
     ************************************************************************/