DOM2级事件处理程序
DOM2级事件处理程序
1 回答
<script type="text/javascript">
var btn3=document.getElementById("btn3");
function showMes(){
alert("hello world!");
}
var eventUtil={
// 添加句柄
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;
}
},
// 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;
}
},
}
eventUtil.addHandler(btn3,'click',showMes);
</script>举报
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