about_off = new Image();
about_off.src = "/elements/right_nav/about.gif";
tradeshows_off = new Image();
tradeshows_off.src = "/elements/right_nav/tradeshows.gif";
worksheets_off = new Image();
worksheets_off.src = "/elements/right_nav/worksheets.gif";
cart_off = new Image();
cart_off.src = "/elements/right_nav/cart.gif";

about_roll = new Image();
about_roll.src = "/elements/right_nav/about_roll.gif";
tradeshows_roll = new Image();
tradeshows_roll.src = "/elements/right_nav/tradeshows_roll.gif";
worksheets_roll = new Image();
worksheets_roll.src = "/elements/right_nav/worksheets_roll.gif";
cart_roll = new Image();
cart_roll.src = "/elements/right_nav/cart_roll.gif";

function rollover(space,image) {
	document.images[space].src = eval(image + ".src");
}