页面载入时在导航栏显示背景图片

当点击“店家公示”页面并载入时显示这样的效果

<script>

$(document).ready(function()

{

$("websiteShow").addclass("on");

})

</script>

 

 

<style type="text/css">

.on{background-image:url("#");}

</style>

 

 

 

<ul id="MainMenu">
                <li><a href="/index.aspx">首 页</a></li>
                <li id="activity"><a href="/activity.aspx" target="_blank">馆促销</a></li>
                <li id="gifts"><a href="/gifts.aspx" target="_blank">超值礼品</a></li>
                <li id="Supplier"><a href="/Supplier.aspx" target="_blank">供货厂商</a></li>
                <li id="Franchisee"><a href="/Franchisee.aspx" target="_blank">特产直营</a></li>
                <li id="shoplist"><a href="/Shop_List.Aspx" target="_blank">联盟商家</a></li>
                <li id="WebsiteShow"><a href="/WebsiteShow.aspx"  target="_blank">店家公示</a></li>
                <li id="abcxflm"><a href="abcxflm.Aspx" target="_blank">精品馆</a></li>
            </ul>