//比如addListener(document,"click",function(){alert('阿会楠')})
function addListener(element,e,fn){
if(element.addEventListener){
element.addEventListener(e,fn,false);
} else {
element.attachEvent("on" + e,fn);
}
}

function(evt){
var evt = window.event?window.event:evt,target=evt.srcElement||evt.target;}