相干CSS样式

<style type="text/css">
 .scrollHid{overflow: hidden;}//隐藏滚动条
#full{position: absolute;background:#F7F7F7;left: 0;top: 0;display: none; z-index:2;filter:alpha(opacity=100);opacity :1.0}//遮罩层

</style>

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jQuery(document.documentElement).addClass("scrollHid");//隐藏滚动条

jQuery(document.documentElement).removeClass("scrollHid");//显示滚动条

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