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) {
		homeover = newImage("images/nav/homeover.gif");
		servicesover = newImage("images/nav/servicesover.gif");
		linksover = newImage("images/nav/linksover.gif");
		specialover = newImage("images/nav/specialover.gif");
		aboutover = newImage("images/nav/aboutover.gif");
		staffover = newImage("images/nav/staffover.gif");
		newsover = newImage("images/nav/newsover.gif");
		textover = newImage("images/nav/textover.gif");
		textover020 = newImage("images/nav/textover-20.gif");
		textover021 = newImage("images/nav/textover-21.gif");
		textover022 = newImage("images/nav/textover-22.gif");
		textover023 = newImage("images/nav/textover-23.gif");
		contactover = newImage("images/nav/contactover.gif");
		preloadFlag = true;
	}
}