var imagePath = "/images/cht/";
	var imageOver = new makeImageArray(3);
	var imageOut = new makeImageArray(3);
	
	imageOver[0] = makeImage("nav_how_it_works_on.gif");			imageOut[0] = makeImage("nav_how_it_works.gif");
	imageOver[1] = makeImage("nav_choose_a_gift_on.gif");		imageOut[1] = makeImage("nav_choose_a_gift.gif");
	imageOver[2] = makeImage("nav_view_basket_on.gif");		imageOut[2] = makeImage("nav_view_basket.gif");
	imageOver[3] = makeImage("nav_check_out_on.gif");	imageOut[3] = makeImage("nav_check_out.gif");


function makeImageArray(n) {
	this.length = n;
	for (var i = 0; i <= n; i++) {
		this[i] = new Image();
	}
	return this;
};

function makeImage(sr) {
	var newImage = new Image();
	newImage.src = imagePath + sr;
	return newImage;
};

function swapImage(num, over) {
	var img = eval("document.images.img" + num);
	(over) ? img.src = imageOver[num].src : img.src = imageOut[num].src;
};