我所做的示例

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<title>无标题文档</title>

<style>

#div1 {

height:150px;

width:100px;

background:#3C0;

display:block;

border:1px solid #000;

}

</style>

<script>

function show(){

var odiv=document.getElementById('div1');

if(odiv.style.display=='none')

{

odiv.style.display='block';

}

else

{

odiv.style.display='none';

}

}

</script>

</head>


<body>

<input type="button"  value="显示隐藏" onclick="show()"/>

<div id="div1">

</div>

</body>

</html>