var verfuegbare_Hoehe;
 var verfuegbare_Breite;
 var Posx;
 var Posy;
 verfuegbare_Hoehe=screen.availHeight;
 verfuegbare_Breite=screen.availWidth;
 posx=(verfuegbare_Breite-800)/2;
 posy=(verfuegbare_Hoehe-600)/2;
 function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}
function popUp2(datei2) {
		big=window.open(datei2,'Fenster','width=620,height=410,statusbar=no,menubar=no,scrollbars=no,resize=no,screenx=' +posx+ ' ,screeny=' +posy+ ',left=' +posx+ ' ,top=' +posy+ '');//
	}
function popUp3(datei3) {
		big=window.open(datei3,'Fenster','width=770,height=480,statusbar=no,menubar=no,scrollbars=no,resize=no,screenx=' +posx+ ' ,screeny=' +posy+ ',left=' +posx+ ' ,top=' +posy+ '');//
	}