function oeffnen(punkt) {
	try {
	document.getElementById(punkt).style.visibility="visible";
	} catch (e) {
	
	}
}

function schliessen() {
	for (var i = 0; i <= 30; i++){
		var id = "N"+i;
		var id_2 = "M"+i;
		try {
			document.getElementById(id).style.visibility="hidden";
			document.getElementById(id_2).style.visibility="hidden";
	  	} catch (e) {
	
	  	}
		
	}
	
}

function roll_in(id) {
	//document.getElementById(id).style.backgroundColor="#bb3c45";
}

function roll_out(id) {
	//document.getElementById(id).style.backgroundColor="#99182c";
}