function hideAllLayers() {
	document.getElementById('accommodation').style.visibility = "hidden";
	document.getElementById('care').style.visibility = "hidden";
	document.getElementById('introduction').style.visibility = "hidden";
	document.getElementById('location').style.visibility = "hidden";
	}

function showLayer(object) {
	hideAllLayers();
	document.getElementById(object).style.visibility = "visible";
	}