var theImages = new Array();

theImages[0] = 'images/top_right_box_1-324x198.gif';
theImages[1] = 'images/top_right_box_2-324x198.gif';
theImages[2] = 'images/top_right_box_3-324x198.gif';
theImages[3] = 'images/top_right_box_4-324x198.gif';

function randomFromTo(from, to){
	return Math.floor(Math.random() * (to - from + 1) + from);
}

var whichImage = randomFromTo(0, 3);

function showImage() {
	document.write('<IMG SRC="'+theImages[whichImage]+'" BORDER="0" ALT="Copy Factory Color Printing" TITLE="Copy Factory" WIDTH="324" HEIGHT="198">');
}