function einblenden(laynum)
                {
					document.getElementById('w'+laynum).style.display = 'none';
					document.getElementById('m'+laynum).style.display = 'block';
					document.getElementById('m'+laynum).style.visibility = 'visible'; 
                }				
             function ausblenden(laynum)
                {
					document.getElementById('m'+laynum).style.display = 'none';
					document.getElementById('w'+laynum).style.display = 'block';
					document.getElementById('w'+laynum).style.visibility = 'visible'; 
                }