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) {
		wetter_icon_tempe_over = newImage("Bilder/wetter_icon_tempe-over.gif");
		wetter_icon_tempe_down = newImage("Bilder/wetter_icon_tempe-down.gif");
		wetter_icon_regen_over = newImage("Bilder/wetter_icon_regen-over.gif");
		wetter_icon_regen_down = newImage("Bilder/wetter_icon_regen-down.gif");
		wetter_icon_sonne_over = newImage("Bilder/wetter_icon_sonne-over.gif");
		wetter_icon_sonne_down = newImage("Bilder/wetter_icon_sonne-down.gif");
		wetter_icon_wasser_over = newImage("Bilder/wetter_icon_wasser-over.gif");
		wetter_icon_wasser_down = newImage("Bilder/wetter_icon_wasser-down.gif");
		preloadFlag = true;
	}
}