function openPage(Adresse) {
  var screenw = screen.availWidth;
  var screenh = screen.availHeight;
  var winw = (1000 + 15);
  var winh = (700 + 15);
  var left = (screenw / 2) - (winw / 2);
  var top = (screenh / 2) - (winh / 2); 
  var options = "width=1000,height=700,left="+left+",top="+top+",toolbar=yes";
  huettner = window.open(Adresse, "huettners.com", options);
  huettner.focus();
}