每次运行时调用eventUtil.getType(event)这些方法时,我用alert出来都是undifine
var eventUtil={
//添加句柄
addHandler:function(element,type,handler){
if(element.addEventListener){
element.addEventListener(type,handler,false);
}else if(element.attechEvent){
element.attechEvent('on'+type,handler);
}else{
element['on'+type]=handler;
}
},
//删除句柄
removeHandler:function(element,type,handler){
if(element.removeEventListener){
element.removeEventListener(type,handler,false);
}else if(element.detachEvent){
element.detachEvent('on'+type,handler);
}else{
element['on'+type]=null;
}
},
//获取事件
getEvent:function(event){
return event?event:window.event;
},
//获取事件类型
getType:function(event){
return event.type;
},
//获取事件元素
getElement:function(event){
return event.target||event.srcElement;
},
//阻止事件冒泡
stopPropagation:function(event){
if(event.stopPropagation){
event.stopPropagation();
}else{
event.cancelBubble=true;
}
},
//阻止默认行为
preventDefault:function(event){
if(event.preventDefault){
event.preventDefault();
}else{
event.returnValue=false;
}
}
}