function popup() {
  var Breite_intern;
  var Hoehe_intern;
  Breite_intern = (window.screen.width/2) - (395);
  Hoehe_intern = (window.screen.height/2) - (260);
  var win2=window.open('popup.html','Angebote',"height=520,width=790,resizable=no,left=" + Breite_intern + ",top=" + Hoehe_intern + ",screenX=" + Breite_intern + ",screenY=" + Hoehe_intern + ",toolbar=0,location=0,directories=0,scrollbars=1");
  win2.focus();
}

function impressum() {
  var Breite_intern;
  var Hoehe_intern;
  Breite_intern = (window.screen.width/2) - (160);
  Hoehe_intern = (window.screen.height/2) - (150);
  var win2 = window.open('impressum.html','impressum',"height=300,width=320,resizable=no,left=" + Breite_intern + ",top=" + Hoehe_intern + ",screenX=" + Breite_intern + ",screenY=" + Hoehe_intern + ",scrollbars=no");
  win2.focus();
}

function disclaimer() {
  var Breite_intern;
  var Hoehe_intern;
  Breite_intern = (window.screen.width/2) - (300);
  Hoehe_intern = (window.screen.height/2) - (260);
  var win2 = window.open('disclaimer.html','disclaimer',"height=520,width=600,resizable=no,left=" + Breite_intern + ",top=" + Hoehe_intern + ",screenX=" + Breite_intern + ",screenY=" + Hoehe_intern + ",scrollbars=yes");
  win2.focus();
}