/**  * addEventHandler方法  * 跨浏览器实现事件绑定  */

function addEventHandler(ele, event, hanlder) {    if (ele.addEventListener) {        ele.addEventListener(event, hanlder, false);    } else if (ele.attachEvent) {        ele.attachEvent("on"+event, hanlder);    } else  {        ele["on" + event] = hanlder;    }}