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) {
		about_car_over = newImage("images/topnav/about_car-over.gif");
		events_over = newImage("images/topnav/events-over.gif");
		education_over = newImage("images/topnav/education-over.gif");
		gov_affairs_over = newImage("images/topnav/gov_affairs-over.gif");
		prof_standards_over = newImage("top_nav/images/prof_standards-over.gif");
		news_over = newImage("images/topnav/news-over.gif");
		legal_tools_over = newImage("images/topnav/legal_tools-over.gif");
		resources_over = newImage("images/topnav/resources-over.gif");
		carhof_over = newImage("images/topnav/carhof-over.gif");
		preloadFlag = true;
	}
}