  <!-- 
   function winOpen(url,name, breite, hoehe, scroller) { 
   links = (screen.width/2)-(breite/2); 
   oben = (screen.height/2)-(hoehe/2); 
   window.open(url,name,"height="+hoehe+",width="+breite+",status = no,toolbar = no,menubar = no,location = no,resizable = no,titlebar = no,scrollbars ="+scroller+",fullscreen = no,top ="+oben+",left ="+links);
   } 
  //--> 
   

function oeffneklassenbuch () {
 hoehe="650";
 breite="750";
links = (screen.width/2)-(breite/2); 
 oben = (screen.height/2)-(hoehe/2+60);
 fenster = window.open("klassenbuch/index.php", "gbook", "height="+hoehe+",width="+breite+",status = no,toolbar = no,menubar = no,location = no,resizable = no,titlebar = no,scrollbars = yes,resizable=no,top ="+oben+",left ="+links);
 fenster.focus();
}

function zeigefotos (url) {
 hoehe="650";
 breite="650";
links = (screen.width/2)-(breite/2); 
 oben = (screen.height/2)-(hoehe/2+60);
 fenster = window.open(url, "fotogalerie", "height="+hoehe+",width="+breite+",status = no,toolbar = no,menubar = no,location = no,resizable = no,titlebar = no,scrollbars = yes,resizable=no,top ="+oben+",left ="+links);
 fenster.focus();
}

function impressum (url) {
 hoehe="450";
 breite="400";
links = (screen.width/2)-(breite/2); 
 oben = (screen.height/2)-(hoehe/2+60);
 fenster = window.open(url, "impressum", "height="+hoehe+",width="+breite+",status = no,toolbar = no,menubar = no,location = no,resizable = no,titlebar = no,scrollbars = yes,resizable=no,top ="+oben+",left ="+links);
 fenster.focus();
}