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) {
/*
		index_07_over = newImage("/images/navigation/home-over.gif");
		index_07_down = newImage("/images/navigation/home-down.gif");
		index_08_over = newImage("/images/navigation/about_us-over.gif");
		index_08_down = newImage("/images/navigation/about_us-down.gif");
		index_09_over = newImage("/images/navigation/what_we_do-over.gif");
		index_09_down = newImage("/images/navigation/what_we_do-down.gif");
		index_10_over = newImage("/images/navigation/for_tutors-over.gif");
		index_10_down = newImage("/images/navigation/for_tutors-down.gif");
		index_11_over = newImage("/images/navigation/links-over.gif");
		index_11_down = newImage("/images/navigation/links-down.gif");
		index_12_over = newImage("/images/navigation/contact_us-over.gif");
		index_12_down = newImage("/images/navigation/contact_us-down.gif");
*/
		preloadFlag = true;
	}
}