if (document.images) {
	directOff = new Image
	directOn = new Image
	nightOff = new Image
	nightOn = new Image
	intrntnlOff = new Image
	intrntnlOn = new Image
	warehouseOff = new Image
	warehouseOn = new Image
	palletsOff = new Image
	palletsOn = new Image
	otherOff = new Image
	otherOn = new Image
	aboutOff = new Image
	aboutOn = new Image

	directOff.src = "../images/direct-off.gif"
	directOn.src = "../images/direct-on.gif"
	nightOff.src = "../images/night-off.gif"
	nightOn.src = "../images/night-on.gif"
	palletsOff.src = "../images/pallets-off.gif"
	palletsOn.src = "../images/pallets-on.gif"
	warehouseOff.src = "../images/warehouse-off.gif"
	warehouseOn.src = "../images/warehouse-on.gif"
	intrntnlOff.src = "../images/intrntnl-off.gif"
	intrntnlOn.src = "../images/intrntnl-on.gif"
	otherOff.src = "../images/other-off.gif"
	otherOn.src = "../images/other-on.gif"
	aboutOff.src = "../images/about-off.gif"
	aboutOn.src = "../images/about-on.gif"
}

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