function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}
function changeImages() {
	if (document.images && (loaded == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			if (document[changeImages.arguments[i]]) {
				document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
			} else {
				changeImages.arguments[i].src = changeImages.arguments[i+1];
			}
		}
	}
}
var loaded;
function preloadImages() {
	for (var i=0;i<preloadImages.arguments.length;i++) {
		newImage(preloadImages.arguments[i]);
	}
	loaded = true;
}
preloadImages(
'/images/nav/about_o.gif','/images/nav/contact_o.gif','/images/nav/partners_o.gif','/images/nav/log_in_o.gif'
);