// arrow swap
	if (document.images) {
		arrowRed = new Image
		arrowBlue = new Image

		arrowRed.src = "images/arrowRed.gif"
		arrowBlue.src = "images/arrowBlue.gif"
	}

	function chgImg(imgField,newImg) {
		if (document.images) {
			document[imgField].src= eval(newImg + ".src")
		}
	}