css 清除浮动的方法

 /*方法一*/

 /*局部清除*/

 .clr:after{content:".";height:;visibility:hidden;display:block;clear:both;}

 .clr{display:inline-block;}

 .clr{display:block;}

 /*彻底清除*/

 .clear{height:;clear:both;overflow:hidden;}

 /*方法二*/

 .clearfix:before,.clearfix:after{

     content:"";

     display:table;

 }

 .clearfix:after{clear:both;}

 .clearfix{

     *zoom:;/*IE/7/6*/

 }