addeventlistener的兼容性写法
var addEvent = function(element,type,callback){
if(element.addEventListener){
element.addEventListener(type,callback,false);
}else if(element.attachEvent){
element.attachEvent('on' + type,callback)
}
}
window.onload = function(){
addEvent(document.getElementById('parent'),'click',function(event){
var event = event || window.event;
var target = event.target || event.srcElement;
if(target.nodeName.toLowerCase() == 'li'){
alert(target.id);
}
});
}
闭包：
<!doctype html>
<title>javascript事件兼容写法</title>
<meta charset="utf-8"/>
<script type="text/javascript">
var addEvent = (function(){
if(document.addEventListener){
return function(element, type,callback){
element.addEventListener(type,callback,false);
}
}else{
return function(element, type,callback){
element.attachEvent('on' + type,callback);
}
}
})();
window.onload = function(){
addEvent(document.getElementById('parent'),'click',function(event){
var event = event || window.event;
var target = event.target || event.srcElement;
if(target.nodeName.toLowerCase() == 'li'){
alert(target.id);
}
});
}
</script>
<ul id="parent">
<li id="test1">aaaa</li>
<li id="test2">aaaa</li>
<li id="test3">aaaa</li>
<li id="test4">aaaa</li>
<li id="test5">aaaa</li>
<li id="test6">aaaa</li>
</ul>
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