var numberOfImages = 7;
var pics = new Array(numberOfImages);
var i;
var j;

function randomPic()
{
	for(i = 0; i < numberOfImages; i++)
	{
		j = new Image();
		j.src='http://www.wishes-cymru.org/images/figures/' + i + '.gif';
		pics[i] = j.src;
	}

	var selectPic = "";
	selectPic = (Math.floor(Math.random() * (numberOfImages - 1)));
	var choice = pics[selectPic];
	document.write('<td class="bg" height="88" align="left" background="' + choice + '">&nbsp;</td>');
}
randomPic();