function testforbtn(event){
alert(window.EventUtil.getEventTarget(window.EventUtil.getEvent( event)));
//event.target
//event.type
//event.currentTarget
//event.srcElement
}
(function(){})(
window.EventUtil={
addHandler:function(element,type,handler){
// alert(1);
if(element)
{
//alert(2);
if(element.addEventListener)
{
// alert(3);
element.addEventListener(type,handler,false);
}else if(element.attachEvent)
{
// alert(4);
element.attachEvent("on"+type,handler);
}else{
// alert(5);
element["on"+type]=handler;
}
}
},
removeHandler:function(element,type,handler){
if(element)
{
if(element.removeEventListener){
element.removeEventListener(type,handler,false);
}else if(element.detachEvent){
element.detachEvent("on"+type,handler);
}else{
element["on"+type]=null;
}
}
},
addReady: function(fn){
if(document.addEventListener){//兼容非IE
document.addEventListener("DOMContentLoaded",function(){
//注销事件，避免反复触发
document.removeEventListener("DOMContentLoaded",arguments.callee,false);
fn();//调用参数函数
},false);
}else if(document.attachEvent){//兼容IE
IEContentLoaded (window, fn);
}
function IEContentLoaded (w, fn) {
var d = w.document, done = false,
// only fire once
init = function () {
if (!done) {
done = true;
fn();
}
};
// polling for no errors
(function () {
try {
// throws errors until after ondocumentready
d.documentElement.doScroll('left');
} catch (e) {
setTimeout(arguments.callee, 50);
return;
}
// no errors, fire
init();
})();
// trying to always fire before onload
d.onreadystatechange = function() {
if (d.readyState == 'complete') {
d.onreadystatechange = null;
init();
}
};
}
},
getEvent:function(event){
return event?window.event:event;
},
getEventTarget: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.EventUtil.addReady(
function(){
var btn1=document.getElementById("mybtn");
window.EventUtil.addHandler(btn1,"click",testforbtn);
}
);