背景图草稿

body
{
background-color:#FFFFFF;
background-image:url(/uploadfile/2013-11/20131128153749666.png);
background-attachment:fixed;
background-repeat:repeat-x;
background-position:50% 100%;
}

background-size:fixed;
background-position:center;

background: #000000 url(http://staticlive.douyutv.com/upload/room_pic/6899b98361c2f66a5a385bc6cb01ca86.jpg) no-repeat center 72px;
\

background:url(“//img.alicdn.com/tps/i4/TB1W5XpHVXXXXazXVXXzF17LVXX-1920-478.jpg”) repeat-x center top;

http://www.cnblogs.com/dolphinX/p/3292997.html