<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>mouseerter与mouseover区别(IE下测试)</title>
</head>
<body>
<div id="result" style="position:absolute;right:100px;top:5px;width:250px;height:400px;border:2px solid gray;overflow:auto;">
</div>
<h3>1，鼠标在div[id=parent1]内部移动时也会触发mouseover事件</h3>
<div id="parent1" style="width:400px;border:1px solid gray;padding:5px;">
<div id="child11" style="width:100px;height:100px;background:gold;float:left;">Child11</div>
<div id="child12" style="width:100px;height:100px;background:gold;float:right;">Child12</div>
<div style="clear:both;"></div>
</div>
<br/>
<h3>2，鼠标在div[id=parent2]内部移动时也不会触发mouseenter事件</h3>
<div id="parent2" style="width:400px;border:1px solid gray;padding:5px;">
<div id="child21" style="width:100px;height:100px;background:gold;float:left;">Child21</div>
<div id="child22" style="width:100px;height:100px;background:gold;float:right;">Child22</div>
<div style="clear:both;"></div>
</div>
<script type="text/javascript">
function on(el,type,fn){
el.addEventListener ? el.addEventListener(type, fn, false) : el.attachEvent('on' + type, fn);
}
function $(id){
return document.getElementById(id);
}
var p1 = $('parent1'),
p2 = $('parent2');
function fn(e){
var d = document.createElement('div');
d.innerHTML = e.type;
$('result').appendChild(d);
}
on(p1,'mouseover',fn);
on(p2,'mouseenter',fn);
</script>
<body>
</html>
