if (document.images) {
	givingOff = new Image
	givingOn = new Image
	whatsonOff = new Image
	whatsonOn = new Image
	bookonlineOff = new Image
	bookonlineOn = new Image
	aboutOff = new Image
	aboutOn = new Image
	helpOff = new Image
	helpOn = new Image
	supportOff = new Image
	supportOn = new Image
	legaciesOff = new Image
	legaciesOn = new Image
	maximiseOff = new Image
	maximiseOn = new Image
	contactOff = new Image
	contactOn = new Image

	givingOff.src = "images/giving-off.png"
	givingOn.src = "images/giving-on.png"
	whatsonOff.src = "images/whatson-off.png"
	whatsonOn.src = "images/whatson-on.png"
	bookonlineOff.src = "images/bookonline-off.png"
	bookonlineOn.src = "images/bookonline-on.png"
	aboutOff.src = "images/about-off.png"
	aboutOn.src = "images/about-on.png"
	helpOff.src = "images/help-off.png"
	helpOn.src = "images/help-on.png"
	supportOff.src = "images/support-off.png"
	supportOn.src = "images/support-on.png"
	legaciesOff.src = "images/legacies-off.png"
	legaciesOn.src = "images/legacies-on.png"
	maximiseOff.src = "images/maximise-off.png"
	maximiseOn.src = "images/maximise-on.png"
	contactOff.src = "images/contact-off.png"
	contactOn.src = "images/contact-on.png"
}

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