Return add/remove listener functions back

hinter.js

@@ -569,6 +569,21 @@ SimpleAutocomplete.GlobalMouseDown = function(ev)
 // *** UTILITY FUNCTIONS ***
 // Remove this section if you already have these functions defined somewhere else
 
+// Cross-browser add/remove event listeners
+var addListener = function()
+{
+    return window.addEventListener
+        ? function(el, type, fn) { el.addEventListener(type, fn, false); }
+        : function(el, type, fn) { el.attachEvent('on'+type, fn); };
+}();
+
+var removeListener = function()
+{
+    return window.removeEventListener
+        ? function(el, type, fn) { el.removeEventListener(type, fn, false); }
+        : function(el, type, fn) { el.detachEvent('on'+type, fn); };
+}();
+
 // Cancel event bubbling and/or default action
 var stopEvent = function(ev, cancelBubble, preventDefault)
 {
@@ -585,6 +600,15 @@ var stopEvent = function(ev, cancelBubble, preventDefault)
     return !preventDefault;
 };
 
+// Remove leading and trailing whitespace
+if (!String.prototype.trim)
+{
+    String.prototype.trim = function()
+    {
+        return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
+    };
+}
+
 // Get element position, relative to the top-left corner of page
 var getOffset = function(elem)
 {