xxxxxxxxxx<html><head><meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> <style>body{ background-image:url('/statics/images/course/smiley.gif'); background-repeat:no-repeat; background-attachment:fixed; background-position:center; }</style></head><body><p><b>注意:</b> 该属性工作在 Firefox 和 Opera, background-attachment 属性会被设置为 "fixed".</p></body></html>