#b{width:1200px;padding:0 12px;background:#FFF;position:relative}.l{width:844px;float:left;border-right:1px solid #DDD;padding-right:10px;position:relative}.m{width:670px;float:left;border-right:1px solid #DDD;padding-right:10px;position:relative}.r{width:336px;float:right;padding-bottom:200px}.topbg{height:30px;background:url(http://css.luhui.net/images/nv.png) repeat -20px 0}

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