var EventUtil={ //跨瀏覽器處理程序---創(chuàng)建方法
addHandler:function(element,type,handler){
if(element.addEventListener){
element.addEventListneter(type,handler,false);
}else if(element.attachEvent){
element.attachEvent("on"+type,handler);
}else{
element["on"+type]=handler;
}
}
removeHandler:function(element,type,handler){ //跨瀏覽器處理程序---刪除方法
if(element.removeEventListener){
element.removeEventListneter(type,handler,false);
}else if(element.detachEvent){
element.detachEvent("on"+type,handler);
}else{
element["on"+type]=handler;
}
}
getEvent:function(event){ //跨瀏覽器事件對象---返回event對象的引用
return event?event:window.event;
}
getTarget:function(event){ //跨瀏覽器事件對象---返回事件的目標
return event.target||event.srcElement;
}
preventDefault:function(event){ //跨瀏覽器事件對象---取消默認事件
if(event.preventDefault){
event.preventDefault();
}else{
event.returnValue=false;
}
}
stoppropagation:function(event){ //跨瀏覽器事件對象---阻止事件流
if(event.stoppropagation){
event.stoppropagation();
}else{
event.canceBubble=false;
}
}
getRelatedTarget:function(event){ //跨瀏覽器獲取相關元素
if(event.relatedTarget){
return event.relatedTarget;
}else if(event.toElement){
return envent.toElement;
}else if(event.fromElement){
return event.fromElement;
}else{
return null;
}
}
getButton:function(event){ //鼠標事件的button屬性檢測
if(document.implementation.hasFeature("MouseEvent","2.0")){
return event.button;
}else{
switch(event.button){
case 0:
case 1:
case 3:
case 5:
case 7:
return 0;
case 2:
case 6:
return 2
case 4:
return 1
}
}
}
getCharCode:function(event){ //跨瀏覽器字符編碼---charCode屬性檢測
if(typeof event,charCode=="number"){
return event.charCode;
}else{
return event.keyCode;
}
}
}