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) {
		grey_green_over = newImage("newgpi/grey-green_over.gif");
		green_blue_over = newImage("newgpi/green-blue_over.gif");
		green_grey_over = newImage("newgpi/green-grey_over.gif");
		blue_grey_over = newImage("newgpi/blue-grey_over.gif");
		line_green_over = newImage("newgpi/line-green_over.gif");
		line_blue_over = newImage("newgpi/line-blue_over.gif");
		line_grey_over = newImage("newgpi/line-grey_over.gif");
		text_green_over = newImage("newgpi/text-green_over.gif");
		text_blue_over = newImage("newgpi/text-blue_over.gif");
		text_grey_over = newImage("newgpi/text-grey_over.gif");
		preloadFlag = true;
	}
}