Document
//添加多张背景图片
.bg{
background: url("栈出.png"),
url("u=264976548,648399195&fm=26&gp=0.jpg");
background-repeat: no-repeat,no-repeat;
background-size: 190px,120px;
background-position: 0 0, 280px 51px;
}
//设置黑白色
html {
-webkit-filter: grayscale(100%);
/* webkit */
-moz-filter: grayscale(100%);
/*firefox*/
-ms-filter: grayscale(100%);
/*ie9*/
-o-filter: grayscale(100%);
/*opera*/
filter: grayscale(100%);
filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
filter: gray;
/*ie9- */
}