if (document.images) {
	var onImgArray = new Array()
	onImgArray[1] = new Image
	onImgArray[2] = new Image
	onImgArray[3] = new Image
	onImgArray[4] = new Image
	onImgArray[5] = new Image
	onImgArray[1].src = "images/menu/ahome.gif"
	onImgArray[2].src = "images/menu/acompany.gif"
	onImgArray[3].src = "images/menu/aapproach.gif"
	onImgArray[4].src = "images/menu/amethodology.gif"
	onImgArray[5].src = "images/menu/acontact.gif"

	var offImgArray = new Array()
	offImgArray[1] = new Image
	offImgArray[2] = new Image
	offImgArray[3] = new Image
	offImgArray[4] = new Image
	offImgArray[5] = new Image
	offImgArray[1].src = "images/menu/home.gif"
	offImgArray[2].src = "images/menu/company.gif"
	offImgArray[3].src = "images/menu/approach.gif"
	offImgArray[4].src = "images/menu/methodology.gif"
	offImgArray[5].src = "images/menu/contact.gif"
}

function imageOn(i) {
	if (document.images) {
		document.images["btn" + i].src = onImgArray[i].src
	}
}
function imageOff(i) {
	if (document.images) {
		document.images["btn" + i].src = offImgArray[i].src
	}
}