css定义各个浏览器 渐变

filter:progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#B3C5F3,endColorStr=#E0E0E0);/*IE8*/
    background:-moz-linear-gradient(top, #B3C5F3, #E0E0E0);
    background:-webkit-gradient(linear, 0 0, 0 bottom, from(#B3C5F3), to(#E0E0E0));
    background:-o-linear-gradient(top, #B3C5F3,#E0E0E0);