if (document.images) {
//Create on image array and populate
	var offImg = new Array()
	offImg[0] = new Image
	offImg[1] = new Image
	offImg[2] = new Image
	offImg[3] = new Image
	offImg[4] = new Image
	offImg[5] = new Image
	offImg[6] = new Image
	offImg[7] = new Image
	offImg[0].src = "nav/home.gif"
	offImg[1].src = "nav/instructions.gif"
	offImg[2].src = "nav/teacher.gif"
	offImg[3].src = "nav/catalog.gif"
	offImg[4].src = "nav/articles.gif"
	offImg[5].src = "nav/links.gif"
	offImg[6].src = "nav/custom.gif"
	offImg[7].src = "nav/contact.gif"	

	
//Create off image src and populate	
	var onImg = new Array()
	onImg[0] = new Image
	onImg[1] = new Image
	onImg[2] = new Image
	onImg[3] = new Image
	onImg[4] = new Image
	onImg[5] = new Image
	onImg[6] = new Image
	onImg[7] = new Image
	onImg[0].src = "nav/home_over.gif"
	onImg[1].src = "nav/instructions_over.gif"
	onImg[2].src = "nav/teacher_over.gif"
	onImg[3].src = "nav/catalog_over.gif"
	onImg[4].src = "nav/articles_over.gif"
	onImg[5].src = "nav/links_over.gif"
	onImg[6].src = "nav/custom_over.gif"
	onImg[7].src = "nav/contact_over.gif"
}

function imgOn(i) {
	if(document.images){
		document.images[i].src = onImg[i].src
	}
}

function imgOff(i) {
 if(document.images){
 	document.images[i].src = offImg[i].src
	}
}

function setMsg(msg){
	window.status = msg
	return true
}