var winID = 0;
var popUp = new Array();

function popupOpener(inhalt, breite, hoehe, winname, scrolling)
{
  var xOff = 10;
  var yOff = 10;
  if (parseInt(navigator.appVersion)>=4)
  {
    xOff = (screen.width-breite)/2;
    yOff = (screen.height-(hoehe))/2;
    yOff -= 20;
  }
  
  popUp[winID] = window.open(inhalt, winname, 'toolbar=no,status=no,location=no,directories=no,resizable=no,scrollbars='+ scrolling +',width='+breite+',height='+hoehe+',left='+xOff+',top='+yOff);
  popUp[winID].focus();
  winID++;
}