如何处理浮动
给父元素增加一个伪类after
.outer {zoom:1;} /*==for IE6/7 Maxthon2==*/
.outer :after {clear:both;content:'.';display:block;width: 0;height: 0;visibility:hidden;} /*==for FF/chrome/opera/IE8==*/
.clear-fix { *overflow: hidden; *zoom: 1; }
.clear-fix:after { display: table; content: ""; width: 0; clear: both; }