// Untermenue oeffnen
function m_show(submenu) 
{
	//Alle Untermenues verstecken
	m_hideall();
	
	//Wenn vorhanden, Untermenue anzeigen
	var checkElement = document.getElementById(submenu);
	if (checkElement != null) { document.getElementById(submenu).style.display= 'block';}	
}

//alle Untermenues verstecken
function m_hideall() 
{
	var checkElement = document.getElementById('menu_0');
	if (checkElement != null) { document.getElementById('menu_0').style.display= 'none';}
	
	var checkElement = document.getElementById('menu_1');
	if (checkElement != null) { document.getElementById('menu_1').style.display= 'none';}
	
	var checkElement = document.getElementById('menu_2');	
	if (checkElement != null) { document.getElementById('menu_2').style.display= 'none';}
	
	var checkElement = document.getElementById('menu_3');
	if (checkElement != null) { document.getElementById('menu_3').style.display= 'none';}
	
	var checkElement = document.getElementById('menu_4');
	if (checkElement != null) { document.getElementById('menu_4').style.display= 'none';}
	
}