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

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// 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 mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

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

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

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


<!-- hide from old browsers
var wind; 
wind == null;
function getwind(URL,hoehe,breite,scrolling)
{       
 wind = open(URL,"wind","height="+hoehe+",width="+breite+",toolbars=no,scrollbars="+scrolling+",directories=no,resize=no,menubar=no");
 if (wind != null) 
  {
 if (wind.opener == null) 
  {
      wind.opener = self;
    }
  }
}  
// end hiding -->																															


function FensterOeffnen (Adresse) {
  Fenster = window.open(Adresse, "Infografik", "width=450,height=350,left=500,top=300,location=no,resizable=yes,status=no");
  Fenster.focus();
}