function preload_images() {
	bottommenu_gastronomie_on = new Image();
	bottommenu_gastronomie_on.src = "images/gastronomie_on.gif";
	bottommenu_gastronomie_off = new Image();
	bottommenu_gastronomie_off.src = "images/gastronomie_off.gif";

	bottommenu_endkunden_on = new Image();
	bottommenu_endkunden_on.src = "images/endkunden_on.gif";
	bottommenu_endkunden_off = new Image();
	bottommenu_endkunden_off.src = "images/endkunden_off.gif";
}

function img_act(imgName)
{
	imgOn = eval(imgName + "_on.src");
	document[imgName].src = imgOn;
}

function img_inact(imgName)
{
	imgOff = eval(imgName + "_off.src");
	document[imgName].src = imgOff;
}

preload_images();