rnd.today=new Date(); rnd.seed=rnd.today.getTime(); function rnd() { rnd.seed = (rnd.seed*9301+49297) % 233280; return rnd.seed/(233280.0); }; function rand(number) { return Math.ceil(rnd()*number) + 1; }; document.getElementById('rightuppergraphic').src = '/images/headerpic' + rand(6) + '.gif';