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_nav_01_over = newImage("/images/buttons/btn_weather_center_over.gif");
		main_nav_02_over = newImage("/images/buttons/btn_weather_ed_over.gif");
		main_nav_03_over = newImage("/images/buttons/btn_weather_games_over.gif");
		main_nav_04_over = newImage("/images/buttons/btn_lets_play_over.gif");
		main_nav_05_over = newImage("/images/buttons/btn_cool_clips_over.gif");
		main_nav_06_over = newImage("/images/buttons/btn_weather_ready_over.gif");
			
		preloadFlag = true;
	}
}

function clearDefault(el) {
	if (el.defaultValue==el.value) el.value = ""
}