images = new Array(3);

images[0] = "<a href='http://serialhyip.com/?a=details&lid=985#vote'><img src='http://serialhyip.com/?a=image&lid=985' border='0' alt='Monitored by serialhyip.com'></a>";
images[1] = "<a href='http://solidhyip.com/?a=details&lid=120#vote'><img src='http://solidhyip.com/?a=image&lid=120' border='0' alt='Monitored by solidhyip.com'></a>";
images[2] = "<a href='http://planethyip.net/?a=details&lid=160#vote'><img src='http://planethyip.net/?a=image&lid=160' border='0' alt='Monitored by planethyip.net'></a>";

index = Math.floor(Math.random() * images.length);
document.write(images[index]);