http://www.cnblogs.com/lhb25/archive/2013/01/30/css3-linear-gradient.html
background: -moz-linear-gradient(top, #ace, #f96);
background: -webkit-linear-gradient(top, #ace, #f96);background: -o-linear-gradient(top, #ace, #f96);原文：http://www.cnblogs.com/lyls/p/7680759.html