背景颜色线性渐变:
body {background: #015b7d;
background-image: -moz-linear-gradient(top, #009ebe, #015b7d );
background-image: -webkit-gradient(linear,left bottom,left top,color-stop(0, #009ebe),color-stop(1, #015b7d));
filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#009ebe', endColorstr='#015b7d');
-ms-filter: progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#009ebe',endColorstr='#015b7d');
}