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) {
		id00_over = newImage("/gui/00-over.gif");
		id01_over = newImage("/gui/01-over.gif");
		id02_over = newImage("/gui/02-over.gif");
		id03_over = newImage("/gui/03-over.gif");
		id04_over = newImage("/gui/04-over.gif");
		id05_over = newImage("/gui/05-over.gif");
		id06_over = newImage("/gui/06-over.gif");
		id07_over = newImage("/gui/07-over.gif");
		preloadFlag = true;
	}
}