function writeRandomImage(images, links) {
	var ry = Math.floor(Math.random() * images.length);
	if (ry == 0) ry = 1;
	if (links != null) {
		document.write('<a href='+'"' + links[ry] + '"' + '><img src="' + images[ry] + '" border="0"></a>');
	} else {
		document.write('<img src="' + images[ry] + '" border="0">');
	}
}