点击显示div

<!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 type="text/css">
    #Layer1 {
    position:absolute;
    left:246px;
    top:84px;
    width:316px;
    height:217px;
    z-index:1;
    display:none;
    background-color:red;
    color:#FFFFFF;
}
</style>
<script type="text/javascript">
    function submit(id){
    document.getElementById(id).style.display="block";
}
</script>
</head>
<body>
    <input name="submit" type="submit" id="submit" onclick='submit("Layer1");' value="点击显示层" />
    <div id="Layer1">我只是一个层</div>
</body>
</html>