<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>

?

?

?

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

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

?