【css】background的复合写法

    background-size如何需要和background连用，那么background-position和background-size间需要用 $字{符}^{\prime }{/}^{\prime }$ 连接。

1）单个写法

	.class1{
		background-image: url("../../images/image.png");
		background-repeat: no-repeat;
		background-attachment: fixed; /*随文本滚动scroll*/
		background-position: center center;
        background-size: 100% 100%;
	}

2)复合写法

	.class2{
		background: #CCC url("../../images/image.png") no-repeat fixed center center/100% 100%;
		/*background: background-color background-image background-repeat background-attachment background-poisiton/background-size;*/
		}