var scW = screen.width;
var backs = new Array('background0.jpg', 'background1.jpg', 'background2.jpg' , 'background3.jpg', 'background4.jpg', 'background5.jpg'); 
var homeBack = backs[Math.floor(Math.random()*backs.length)];
document.write('<style type="text/css"> body, html {background-image: url(/thumb.php?src=/images/'+homeBack+'&w='+scW+');} </style>');
//document.write('background-image: url(/images/'+homeBack+');');