pic = new Array('<img src="http://balaji.waphall.com/images/js/w/welcome1.gif">','<img src="http://balaji.waphall.com/images/js/w/welcome2.gif">','<img src="http://balaji.waphall.com/images/js/w/welcome3.gif">','<img src="http://balaji.waphall.com/images/js/w/welcome4.gif">','<img src="http://balaji.waphall.com/images/js/w/welcome5.gif">','<img src="http://balaji.waphall.com/images/js/w/welcome6.gif">');   
n=Math.floor(Math.random() * 6);
document.write(pic[n]);