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

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

	  	}
	}
}

function roll_in(id) {
	document.getElementById(id).style.backgroundImage = "url(../pix/layout/bg_CI_color_sub_nav_active.jpg)";
}

function roll_out(id) {
	document.getElementById(id).style.backgroundImage = "";
}