// JavaScript Document var backgr1="images/background1.jpg" var backgr2="images/background2.jpg" var backgr3="images/background2.jpg" var cur=Math.round(6*Math.random()) if (cur<=1) backgr=backgr1 else if (cur<=4) backgr=backgr2 else backgr=backgr3 document.write('')