var bg = new Array();
bg[0] = '../images/back1b.jpg'
bg[1] = '../images/back2b.jpg'
bg[2] = '../images/back3b.jpg'
bg[3] = '../images/back4b.jpg'
bg[4] = '../images/back5b.jpg'
bg[5] = '../images/back6b.jpg'
var index = (Math.round(Math.random()*100%(bg.length-1)));
document.write("<table style='background-repeat: no-repeat; width: 980; height:100%' BACKGROUND="+bg[index]+">");