function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_01_over = newImage("images/nav_01-over.gif");
		nav_03_over = newImage("images/nav_03-over.gif");
		nav_04_nav_03_over = newImage("images/nav_04-nav_03_over.gif");
		nav_04_over = newImage("images/nav_04-over.gif");
		nav_05_nav_04_over = newImage("images/nav_05-nav_04_over.gif");
		nav_05_over = newImage("images/nav_05-over.gif");
		shopping_nav_05_over = newImage("images/shopping-nav_05_over.gif");
		shopping_over = newImage("images/shopping-over.gif");
		nav_07_shopping_over = newImage("images/nav_07-shopping_over.gif");
		nav_07_over = newImage("images/nav_07-over.gif");
		preloadFlag = true;
	}
}