例子：选项卡和进度条
一、选项卡
<style type="text/css">
*{margin:0px auto; padding:0px;}
#xuanxiangka{ width:434px; height:26px;text-align:center; line-height:26px; vertical-align:middle;}
.xuanxiang{ width:434px; height:230px; display:none;}
#a:hover{cursor:pointer;}
#gongda{display:block; background-color:#309;}
#meiti{background-color:#F03;}
</style>
</head>
<body>
<div id="xuanxiangka">
<div id="a" style="width:80px; height:25px; float:left;background-color:#309" onclick="showa('gongda')">工大要闻</div>
<div id="a" style="width:80px; height:25px; float:left;background-color:#F03;" onclick="showa('meiti')">媒体工大</div>
</div>
<div id="gongda" class="xuanxiang"></div>
<div id="meiti" class="xuanxiang"></div>
<script type="text/javascript">
function showa(d)
{
var div=document.getElementById(d);
var xuanxiang=document.getElementsByClassName("xuanxiang");
for(var i=0;i<xuanxiang.length;i++)
{
xuanxiang[i].style.display="none";
}
div.style.display="block";
}
</script>
</body>
二、进度条
<style type="text/css">
*{ margin:0px auto; padding:0px}
#kuang{ width:200px; height:40px; border:2px solid #60F;}
#jindu{ height:40px; background-color:#F03; float:left}
</style>
</head>
<body>
<div id="kuang">
<div id="jindu" style="width:0px"></div>
</div>
<script type="text/javascript">
window.setTimeout("jindu()",30);
//调一下进度前进1%
function jindu()
{
//获取进度div的宽度
var div = document.getElementById("jindu");
//获取到的是字符串"0px"
var str = div.style.width;
//处理字符串获取数字
var cd = str.substr(0,str.length-2);
//判断长度是否到最大值
if(cd<200)
{
//将长度转为整数加2
var cd = parseInt(cd)+2;
//让进度的DIV长度变为cd
div.style.width = cd+"px";
//调用自身
window.setTimeout("jindu()",30);
}
}
</script>
</body>
