<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="Generator" content="EditPlus®">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<title>mouseover事件与mouseenter事件的区别</title>
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<script type="text/javascript">
x=0;
y=0;
$(document).ready(function(){
$("div.over").mouseover(function(){
$(".over span").text(x+=1);
});
$("div.enter").mouseenter(function(){
$(".enter span").text(y+=1);
});
});
</script>
</head>
<body>
<p>不论鼠标指针穿过被选元素或其子元素，都会触发 mouseover 事件。</p>
<p>只有在鼠标指针穿过被选元素时，才会触发 mouseenter 事件。</p>
<div class="over" style="background-color:lightgray;padding:20px;width:40%;float:left">
<h2 style="background-color:white;">被触发的 Mouseover 事件：<span></span></h2>
</div>
<div class="enter" style="background-color:lightgray;padding:20px;width:40%;float:right">
<h2 style="background-color:white;">被触发的 Mouseenter 事件：<span></span></h2>
</div>
</body>
</html>
原文：http://www.cnblogs.com/xvefei/p/5038677.html