window.onload=zeigen;

				function zeigen(id) {

				  	 for (var i = 1; i<=5; i++) {

				  	   	 if (document.getElementById("submenue"+i)) {document.getElementById("submenue"+i).style.display="none";}

				  	 }

				if (document.getElementById(id)) {document.getElementById(id).style.display="block";}

}