跨浏览器之事件处理程序

 1 function addEvent(obj,type,handle){
 2     if(obj.addEventListener){//兼容DOM3级
 3         obj.addEventListener(type,handle,false);
 4     }
 5     else if(obj.attachEvent){//兼容DOM0级
 6         obj.attachEvent("on"+type,handle);
 7     }
 8     else{//IE
 9         var type = "on"+type;
10         obj.type = handle;
11     }
12 }
13 
14 function removeEvent(obj,type,handle){
15     if(obj.removeEventListener){//兼容DOM3级
16         obj.removeEventListener(type,handle,false);
17     }
18     else if(obj.detachEvent){//兼容DOM0级
19         obj.detachEvent("on"+type,handle);
20     }
21     else{//IE
22         var type = "on"+type;
23         obj.type = null;
24     }
25 }