css多背景图得书写

background-image:url("http://dotnet.aspx.cc/Book/Images/CSS1_s.jpg 

"),url("http://dotnet.aspx.cc/Book/Images/CSS2_s.jpg 

"),url("http://dotnet.aspx.cc/Book/Images/ASPNET20Book1_s.jpg 

");
background-repeat: no-repeat, no-repeat, no-repeat;  
background-position: 0 0, 200px 0, 400px 201px;