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) {
		Button1_over = newImage("images/Button1-over.gif");
		Button2_Button1_over = newImage("images/Button2-Button1_over.gif");
		Button2_over = newImage("images/Button2-over.gif");
		Button3_Button2_over = newImage("images/Button3-Button2_over.gif");
		Button3_over = newImage("images/Button3-over.gif");
		Button4_Button3_over = newImage("images/Button4-Button3_over.gif");
		Button4_over = newImage("images/Button4-over.gif");
		Slice04 = newImage("images/sliced_04.gif");
		Slice04over = newImage("images/sliced_04_Over.gif");
		Slice08 = newImage("images/sliced_08.gif");
		Slice08over = newImage("images/sliced_08_Over.gif");
		
		preloadFlag = true;
	}
}