if (document.images) {
	Image01on = new Image(240,240);
	Image01on.src = "images/specialoffer_on.gif";  
	Image01off = new Image(240,240);
	Image01off.src = "images/specialoffer_off.gif";
}

function lightup(imgName) {
	if (document.images) {
		imgOn = eval(imgName + "on.src");
		document[imgName].src = imgOn;
	}
}

function turnoff(imgName) {
	if (document.images) {
		imgOff = eval(imgName + "off.src");
		document[imgName].src = imgOff;
	}
}