clearfix

clearfix .css

/*
 *@ Name:       闭合浮动
 *@ Update:     2013-02-17
 *@ Usage:      在需要闭合浮动的元素上（浮动元素的父容器）加 .clearfix
 */

.clearfix:after {
    visibility: hidden;
    display: block;
    content: ".";
    font-size: 0;
    height: 0;
    clear: both;
}
.clearfix {
    *zoom: 1; /* IE6-7 触发 hasLayout */
}