'bgproperties' Example
<html> <head> <style>.body1 { background-image:url("http://www.java2s.com/style/logo.png"); } .body2 { background-image:none;!important } </style> </head> <body id="myBody" bgproperties="fixed" background="http://www.java2s.com/style/logo.png" onclick="this.className='body2'"> </body> </html>