做到在网页加载的时候临时改div的样式
<body>
<form id="form1" runat="server">
<div id="left" >
</div>
<script type="text/jscript">
function ChangeStyle()
{
document.getElementById("left").style.width="0";
document.getElementById("left").style.margin="0";
document.getElementById("left").style.padding="0";
}
ChangeStyle();
</script>
</form>
</body>