function nav_on(x) {
	if (document.getElementById(x)) {
		document.getElementById(x).className = "nav_dot_on";
	}
}

function nav_off(x) {
	if (x != aktiv_reg) {
		document.getElementById(x).className = "nav_dot_off";
	}
	nav_on('reg'+aktiv_reg);
}

function obj_on(x,name) {
	if (document.getElementById(x)) document.getElementById(x).className = name;
}

function obj_off(x,name) {
	if (document.getElementById(x)) document.getElementById(x).className = name;
}

function zoom(id,titel,copyright) {
	window.open("zoom.php?id="+id+"&titel="+titel+"&copyright="+copyright,"photo","height=420,width=520,location=no,menubar=no,resizable=no,scrollbars=no,status=yes,toolbar=no");
}

function inline_box(id) {
	if (document.getElementById(id)) {
		if (document.getElementById(id).style.display == "inline") {
			document.getElementById(id).style.display = "none";
		} else {
			document.getElementById(id).style.display = "inline";
		}
	}
}