CSS background image to fit width, height should auto-scale

The below is the syntax to adjust css background image auto width, height by auto scale for all platform browsers
 

<style type="text/css">
   body{
     background : url('images/logo.jpg');
     background-size:100% 100%;
     background-attachment:fixed;
     background-repeat:no-repeat;
     -webkit-background-size: 100% 100%;
     -moz-background-size: 100% 100%;
     -o-background-size: 100% 100%;      
   }
</style>