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) {
		Main_GCI_over = newImage("images/Main_GCI-over.gif");
		Main_GTI_over = newImage("images/Main_GTI-over.jpg");
		Main_Profile_over = newImage("images/Main_Profile-over.gif");
		Main_Products_over = newImage("images/Main_Products-over.gif");
		Main_Locations_over = newImage("images/Main_Locations-over.gif");
		Main_Contact_over = newImage("images/Main_Contact-over.gif");
		Main_Home_over = newImage("images/Main_Home-over.gif");
		preloadFlag = true;
	}
}