var timeout         = 500;
var closetimer		= 0;
var ddmenuitem      = 0;

// bild vergrössert anzeigen
function anzeigen(das){
         
         if(document.getElementById(das).style.display=="none")  
         {document.getElementById(das).style.display="inline"; }
          else { document.getElementById(das).style.display="none"; } 
          } 
          
// open hidden layer
function menuopen(id)
{	
    
	// cancel close timer
	menucancelclosetime();

    
	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function menuclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function menuclosetime()
{
	closetimer = window.setTimeout(menuclose, timeout);
}

// cancel close timer
function menucancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = menuclose; 
//