function toggleLayer(div_layer,mode) {
	var x = document.getElementById(div_layer);
	if (mode == "") {
		if (x.style.display == "none") {
			x.style.display = "";
		} else {
			x.style.display = "none";
		}
	} else {
		if (mode == "false") {
			x.style.display = "none";
		} else {
			x.style.display = "";
		}
	}
}

function menu_background(id, img) {
	document.getElementById(id).style.background = 'url(\''+img+'\')';
}