摘要:
<div style="position:absolute; width:740px; height:340px; left:50%; top:50%; margin:-170px 0 0 -370px; background:#f00;"></div> 阅读全文
摘要:
.clearfix:after{visibility:hidden;display:block;font-size:0;content:"\20";clear:both;height:0;}* html .clearfix{zoom:1;}/* IE6 */.clear{ clear:both;}:first-child+html .clearfix{zoom:1;}/* IE7 */.clearfix{zoom:1;}使用方法:在浮动层的外层调用clearfix样式clear:both;或者在浮动层下加:div样式添加上一个样式 阅读全文