I am getting the following error when a page loads containing a tree in IE7 and FF 3.0.1: Error: L.dispatchEvent is not a function It says that the error is at Line 4 in https://localhost/xmlhttp/1219673432026/ice-extras.js Line 4 is as follows: if(!window.Event){var Event={};}Object.extend(Event,{KEY_BACKSPACE:8,KEY_TAB:9,KEY_RETURN:13,KEY_ESC:27,KEY_LEFT:37,KEY_UP:38,KEY_RIGHT:39,KEY_DOWN:40,KEY_DELETE:46,KEY_HOME:36,KEY_END:35,KEY_PAGEUP:33,KEY_PAGEDOWN:34,KEY_INSERT:45,cache:{},relatedTarget:function(B){var A;switch(B.type){case"mouseover":A=B.fromElement;break;case"mouseout":A=B.toElement;break;default:return null;}return Element.extend(A);}});Event.Methods=(function(){var A;if(Prototype.Browser.IE){var B={0:1,1:4,2:2};A=function(D,C){return D.button==B[C];};}else{if(Prototype.Browser.WebKit){A=function(D,C){switch(C){case 0:return D.which==1&&!D.metaKey;case 1:return D.which==1&&D.metaKey;default:return false;}};}else{A=function(D,C){return D.which?(D.which===C+1):(D.button===C);};}}return{isLeftClick:function(C){return A(C,0);},isMiddleClick:function(C){return A(C,1);},isRightClick:function(C){return A(C,2);},element:function(D){var C=Event.extend(D).target;return Element.extend(C.nodeType==Node.TEXT_NODE?C.parentNode:C);},findElement:function(D,F){var C=Event.element(D);if(!F){return C;}var ...