var img_current = 0; 

function showgalleryIMG(imgid) {
	document.getElementById("IMG-" + img_current).style.display = "none";
	document.getElementById("IMG-" + imgid).style.display = "block";
	
	img_current = imgid;
	return false;
}

function showLegende(imgid) {
	document.getElementById("IMGLAYER-" + imgid).style.display = "block";
}

function hideLegende(imgid) {
	document.getElementById("IMGLAYER-" + imgid).style.display = "none";
}