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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css" >
#div1{100px;height:200px;background:#ccc;display:none;}
</style>
<script type="text/javascript">
function showhide()
{
var oDiv=document.getElementById("div1");
if(oDiv.style.display=="block")
{
oDiv.style.display="none";
}
else
{
oDiv.style.display="block";
}
}
</script>
</head>
<body>
<input type="button" value="点击显示与隐藏" onclick="showhide();"/>
<div id="div1">
</div>
</body>
</html>