/*第三行報(bào)錯(cuò)：event.js:3Uncaught?TypeError:?Cannot?read?property?'addEventListener'?of?null
這是錯(cuò)在哪里？*/
var?eventUtil={
addHandler:function(element,type,handler){
if(element.addEventListener){
element.addEventListener(type,handler,false);
}else?if(element.attachEvent){
element.attachEvent("on"+type,handler);
}else{
element["on"+type]?=?handler;
}
},
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;
}
},
getEvent:function(event){
/*var?event?=?event?||?window.event;
return?event;*/
return?event?event:window.event;
},
getType:function(event){
return?event.type;
},
getElement:function(event){
return?event.target?||?event.srcElement;
},
preventDefault:function(event){
if(event.preventDefault){
event.preventDefault();
}else{
event.returnValue?=?false;
}
},
stopPropagation:function(evnt){
if(event.stopPropagation){
event.stopPropagation();
}else{
event.cancelBubble?=?true;
}
}
}