div 2列和3列显示
<html><head><title>div2,3列显示</title><style type="text/css">.bgk {width: 500px;border: 1px solid #FF0000;}.bgk li{float: left;position: relative;height: 50px;width: 50%;}</style><style type="text/css">#d1 span{ width:197px; height:18px; float:left; border:solid 1px blue;}</style></head><body><!-- 2列显示 --><div id="d1"><span>1</span><span>1</span><span>1</span><span>1</span><span>1</span><span>1</span><span>1</span><span>1</span><span>1</span></div></body></html>