<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>getElementByTagName Tab选项卡</title>
<style type="text/css">
ul{
margin:0;
padding:0;
list-style:none;
}
#tab{
400px;
height:300px
}
#tab_nav{
height:25px;
line-height:25px;
100%;
overflow:hidden;
}
#tab_nav h3{
margin:0;
padding:0;
80px;
background:#ccc;
line-height:25px;
text-align:center;
float:left;
border:2px solid white;
color:white;
}
#tab_nav h3.hot{
border:2px solid #888;
background:#888;
}
#tab_content {
100%;
height:175px;
background:#888;
}
#tab_content ul {
display:none;
}
#tab_content ul.hot{
display:block;
}
</style>
</head>
<body>
<div id="tab">
<div id="tab_nav">
<h3 onmouseover="switchTab(0)" class="hot">选项卡1</h3>
<h3 onmouseover="switchTab(1)">选项卡2</h3>
<h3 onmouseover="switchTab(2)">选项卡3</h3>
<h3 onmouseover="switchTab(3)">选项卡4</h3>
</div>
<div id="tab_content">
<ul class="hot">
<li>内容1</li>
<li>内容1</li>
</ul>
<ul>
<li>内容2</li>
<li>内容2</li>
</ul>
<ul>
<li>内容3</li>
<li>内容3</li>
</ul>
<ul>
<li>内容4</li>
<li>内容4</li>
</ul>
</div>
</div>
<script type="text/javascript">
var h3os = document.getElementsByTagName('h3');
var ulos = document.getElementById('tab_content').getElementsByTagName('ul');
function switchTab(num){
for(var i=0; i< h3os.length; i++){
if (i == num){
h3os[i].className = 'hot';
ulos[i].style.display = 'block';
} else {
h3os[i].className = '';
ulos[i].style.display = 'none';
}
}
}
</script>
</body>
</html>