<script type="text/javascript">
function addEvent(dom,type,fn) {
    if(document.addEventListener) {
        dom.addEventListener(type, fn, false);
    } else if(document.attachEvent) {
        dom.attachEvent('on' + type, fn);
    } else {
        dom['on' + type] = fn;
    };
    dom["Listener-"+type]=!0;
}

function getDomEvent(o){
    var a="blur focus focusin focusout load resize scroll unload click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup error contextmenu".split(' ');
    var b=[];
    for(var i=0;i<a.length;i++){
        if(o['on'+a[i]] || o["Listener-"+a[i]] || o.getAttribute('on'+a[i])){
            b.push(a[i]);
        };
    };

    return b;
};
function x(){
    alert('1')
}
window.onload=function(){
    var o=document.getElementById("test");
    o.onclick=function(){
        alert('1');
    };
    o.onblur=function(){
        alert('1');
    };
    addEvent(o,'mouseover',x);//使用这种方式去临听事件

    var b=getDomEvent(o);
    alert(b);//绑定的事件列表
}
</script>
<input type="text"  id="test" value="1"/>