// JavaScript Document
  function oeffnefenster(theURL,winName,features, breite, hoehe, Center) {
           if (window.screen)if(Center)if(Center=="true"){
              var links = (screen.width-breite)/2;
              var oben = (screen.height-hoehe)/2;
              features+=(features!='')?',':'';
              features+=',left='+links+',top='+oben;
           }
           fen=window.open(theURL,winName,features+((features!='')?',':'')+'width='+breite+',height='+hoehe);
           fen.focus();
  }