【前端积累】常用事件的js公用方法

1 var eventUtil={
2              // 添加句柄
3              addHandler:function(element,type,handler){
4                if(element.addEventListener){
5                  element.addEventListener(type,handler,false);
6                }else if(element.attachEvent){
7                  element.attachEvent('on'+type,handler);
8                }else{
9                  element['on'+type]=handler;
10                }
11              },
12              // 删除句柄
13              removeHandler:function(element,type,handler){
14                if(element.removeEventListener){
15                  element.removeEventListener(type,handler,false);
16                }else if(element.detachEvent){
17                  element.detachEvent('on'+type,handler);
18                }else{
19                  element['on'+type]=null;
20                }
21              },
22           getEvent:function(event){
23             return event?event:window.event;
24           },
25           getType:function(event){
26             return event.type;
27           },
28           getElement:function(event){
29             return event.target || event.srcElement;
30           },
31           preventDefault:function(event){
32             if(event.preventDefault){
33               event.preventDefault();
34             }else{
35               event.returnValue=false;
36             }
37           },
38          stopPropagation:function(event){
39            if(event.stopPropagation){
40              event.stopPropagation();
41            }else{
42              event.cancelBubble=true;
43            }
44          }
45   }