1 // 把所有方法封装到一个对象里面，充分考虑兼容写法
2 var EventUtil = {
3 // 添加DOM事件
4 addEvent: function(element, type, handler) {
5 if(element.addEventListener) { //DOM2级
6 element.addEventListener(type, handler, false);
7 }else if(element.attachEvent) { //IE
8 element.attachEvent("on"+ type, handler);
9 }else {
10 element["on" + type] = handler;
11 }
12 },
13 // 移除DOM事件
14 removeEvent: function(element, type, handler) {
15 if(element.removeEventListener) { //DOM2级
16 element.removeEventListener(type, handler, false);
17 }else if(element.detachEvent) { //IE
18 element.detachEvent("on"+ type, handler);
19 }else {
20 element["on" + type] = null;
21 }
22 },
23 // 阻止事件冒泡
24 stopPropagation: function(ev) {
25 if(ev.stopPropagation) {
26 ev.stopPropagation();
27 }else {
28 ev.cancelBubble = true;
29 }
30 },
31 // 阻止默认事件
32 preventDefault: function(ev) {
33 if(ev.preventDefault) {
34 ev.preventDefaule();
35 }else {
36 ev.returnValue = false;
37 }
38 },
39 // 获取事件源对象
40 getTarget: function(ev) {
41 return event.target || event.srcElement;
42 },
43 // 获取事件对象
44 getEvent: function(e) {
45 var ev = e || window.event;
46 if(!ev) {
47 var c = this.getEvent.caller;
48 while(c) {
49 ev = c.arguments[0];
50 if(ev && Event == ev.constructor) {
51 break;
52 }
53 c = c.caller;
54 }
55 }
56 return ev;
57 }
58 };
59
