js 事件兼容

(function(window) {
window.EventUtil ={
addEventHandler:function(element,type,handler){
if(element.addEventListener)
element.addEventListener(type,handler,false);
else if(element.attachHaattachEventdler)
element.attachEvent('on' + type,handler)
else
element['on' + type] = null;
},
removeEventHandler:function(element,type,handler){
if(element.removeEventListener)
element.removeEventListener(type,handler,false);
else if(element.detachEvent)
element.detachEvent('on' + type,handler)
else
element['on' + type] = null;
},
formatEvent:function(oEvent){
var isIE=/msie/i.test(navigator.userAgent),
isWin=/win/i.test(navigator.userAgent);
if(isIE && isWin){
oEvent.charCode=(oEvent.type == "keypress")?oEvent.keyCode:0;
oEvent.eventPhase =2;
oEvent.isChar=(oEvent.charCode>0);
oEvent.pageX=oEvent.clientX+document.body.scrollLeft;
oEvent.pageY=oEvent.clientY+document.body.scrollTop;
oEvent.preventDefault=function(){
this.returnvalue=false;
}
if(oEvent.type == "mouseout"){
oEvent.relateTarget=oEvent.toElement;
}else if(oEvent.type=="mouseover"){
oEvent.relatedTarget=oEvent.fromElement;
}
oEvent.stopPropagation=function(){
this.cancelBubble=true;
}
oEvent.target=oEvent.srcElement;
oEvent.time=(new Date()).getTime();
}
return oEvent;
},
getEvent: function(event){
if(event)
return EventUtil.getEvent.caller.arguments[0];
else
return this.formatEvent(window.event);
},
getTarget:function(event){
return event.target||event.srcElement;
},
preventDefault:function(event){
if(event.preventDefault)
event.preventDefault();
else
event.returnValue = false;
},
stopPropagation:function(event){
if(event.stopPropagation)
event.stopPropagation();
else
event.cancelBubble = true;
}
};
})(window);