function nachoben () {
  window.scrollTo(0, 0);
focus();
}





function fortschritt (){
var position_hor;
var position_vert;
position_hor = (screen.width - 800)/2;
position_vert = (screen.height - 600)/2.2;
NeuesFenster = window.open("extraproben/fortschritt.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
 NeuesFenster.focus();}

function attenzione (){
var position_hor;
var position_vert;
position_hor = (screen.width - 600)/2;
position_vert = (screen.height - 430)/2.2;
NeuesFenster = window.open("extraproben/attenzione.htm", "Zweitfenster", "location=no,toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=600,height=430,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
 NeuesFenster.focus();}


function attenzione2 (){
var position_hor;
var position_vert;
position_hor = (screen.width - 600)/2;
position_vert = (screen.height - 430)/2.2;
NeuesFenster = window.open("../extraproben/attenzione.htm", "Zweitfenster", "location=no,toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=600,height=430,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
 NeuesFenster.focus();}


function braincheck (){
var position_hor;
var position_vert;
position_hor = (screen.width - 540)/2;
position_vert = (screen.height - 500)/2.2;
NeuesFenster = window.open("http://www.selcox.de/hp/features/braincheck/braincheck.html", "Zweitfenster", "location=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=540,height=500,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}


function figureone (){
var position_hor;
var position_vert;
position_hor = (screen.width - 800)/2;
position_vert = (screen.height - 600)/2.2;
NeuesFenster = window.open("extraproben/figure_one.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}

function figureone2 (){
var position_hor;
var position_vert;
position_hor = (screen.width - 800)/2;
position_vert = (screen.height - 600)/2.2;
NeuesFenster = window.open("../extraproben/figure_one.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}


function zeitraum (){
var position_hor;
var position_vert;
position_hor = (screen.width - 800)/2;
position_vert = (screen.height - 600)/2.2;
NeuesFenster = window.open("extraproben/zeitvertreib.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}

function zeitraum2 (){
var position_hor;
var position_vert;
position_hor = (screen.width - 800)/2;
position_vert = (screen.height - 600)/2.2;
NeuesFenster = window.open("../extraproben/zeitvertreib.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=800,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}


function darwin (){
var position_hor;
var position_vert;
position_hor = (screen.width - 650)/2;
position_vert = (screen.height - 420)/2.2;
NeuesFenster = window.open("extraproben/darwins_world.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=650,height=420,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}

function darwin2 (){
var position_hor;
var position_vert;
position_hor = (screen.width - 650)/2;
position_vert = (screen.height - 420)/2.2;
NeuesFenster = window.open("../extraproben/darwins_world.htm", "Zweitfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=650,height=420,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
NeuesFenster.focus();}



function sky (datei){
var position_hor;
var position_vert;
position_hor = (screen.width - 120)/2;
position_vert = (screen.height - 600)/2.2;
SkyFenster = window.open(datei, "Skyfenster", "locationbar=no,toolbar=no,menubar=no,scrollbars=no,resizable=no,width=120,height=600,status=no,top=" + position_vert + "px,left=" + position_hor + "px");
SkyFenster.focus();}



function skyfensterZu (){
SkyFenster.window.close();
}