添加事件绑定程序

 1 /*oTarget:绑定对象目标
 2 sEventType:事件类型，如onclick、onmouseover等
 3 fnHandler:事件处理函数
 4 */
 5 function AddEventListener(oTarget,sEventType,fnHandler){
 6     if(oTarget.addEventListener){  //兼容DOM
 7         oTarget.addEventListener(sEventType,fnHandler,false)
 8     }else if(oTarget.attachEvent){  //兼容IE
 9         oTarget.attachEvent("on" + sEventType, fnHandler)
10     };
11 };