function showGalleries () {
	if (document.getElementById("Gallery2d").style.display=="none") {
		document.getElementById("Gallery2d").style.display="block";
		document.getElementById("Gallery3d").style.display="block";
	}
	
}
function hideGalleries() {
	if (document.getElementById("Gallery2d").style.display=="block") {
		document.getElementById("Gallery2d").style.display="none";
		document.getElementById("Gallery3d").style.display="none";
	}
}