currentShownDiv = "";

function klapp(id)
{
currentShownObj = document.getElementById(currentShownDiv);
   
if (currentShownObj != null)
currentShownObj.style.display='none'; 
      
if (id == currentShownDiv)
{
currentShownDiv = "";
return;
}
   
currentShownDiv = id;
   
objToShow = document.getElementById(id);
   
if (objToShow.style.display == 'none')
{
objToShow.style.display='block';
}
else
{
objToShow.style.display='none';
}
}

function popup(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}