imgon=new Image();
imgon.src="/img/li1.gif";

imgoff=new Image();
imgoff.src="/img/1x1.gif";

function ImgOn(imgName,WhatPicture) {
	if (document.images) {
		document.images[WhatPicture].src=eval(imgName+"on.src");
	}
}

function ImgOff(imgName,WhatPicture) {
	if (document.images) {
		document.images[WhatPicture].src=eval(imgName+"off.src");
	}
}