function rnd() {
today = new Date();
jran = today.getTime();
jran = (jran * 9301 + 49297) % 233280;
return jran/(233280 * 1.0);
};

function rand(number) {
return Math.ceil(rnd()*number);
};

document.write("<img src='/images/random/random" + rand(11) + ".jpg'>");