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) {
		home_over = newImage("images/home_on.jpg");
		skytah_over = newImage("images/skytah_on.jpg");
		multimedia_over = newImage("images/mutlimedia_on.jpg");
		shop_over = newImage("images/shop_on.jpg");
		tourdates_over = newImage("images/tourdates_on.jpg");
		contact_over = newImage("images/contact_on.jpg");
		pers_over = newImage("images/pers_on.jpg");
		preloadFlag = true;
	}
}