if (document.images) {
  projekte_start_f2 = new Image(63 ,12); projekte_start_f2.src = "images/projekte_start_f2.gif";
  projekte_start_f2 = new Image(63 ,12); projekte_start_f2.src = "images/projekte_start_f4.gif";
  projekte_start_f1 = new Image(63 ,12); projekte_start_f1.src = "images/projekte_start.gif";
  projekte_start_f3 = new Image(63 ,12); projekte_start_f3.src = "images/projekte_start_f3.gif";
  methoden_start_f2 = new Image(122 ,11); methoden_start_f2.src = "images/methoden_start_f2.gif";
  methoden_start_f2 = new Image(122 ,11); methoden_start_f2.src = "images/methoden_start_f4.gif";
  methoden_start_f1 = new Image(122 ,11); methoden_start_f1.src = "images/methoden_start.gif";
  methoden_start_f3 = new Image(122 ,11); methoden_start_f3.src = "images/methoden_start_f3.gif";
  lehre_start_f2 = new Image(47 ,11); lehre_start_f2.src = "images/lehre_start_f2.gif";
  lehre_start_f2 = new Image(47 ,11); lehre_start_f2.src = "images/lehre_start_f4.gif";
  lehre_start_f1 = new Image(47 ,11); lehre_start_f1.src = "images/lehre_start.gif";
  lehre_start_f3 = new Image(47 ,11); lehre_start_f3.src = "images/lehre_start_f3.gif";
  publikationen_start_f2 = new Image(91 ,12); publikationen_start_f2.src = "images/publikationen_start_f2.gif";
  publikationen_start_f2 = new Image(91 ,12); publikationen_start_f2.src = "images/publikationen_start_f4.gif";
  publikationen_start_f1 = new Image(91 ,12); publikationen_start_f1.src = "images/publikationen_start.gif";
  publikationen_start_f3 = new Image(91 ,12); publikationen_start_f3.src = "images/publikationen_start_f3.gif";
  kontakt_start_f2 = new Image(67 ,11); kontakt_start_f2.src = "images/kontakt_start_f2.gif";
  kontakt_start_f2 = new Image(67 ,11); kontakt_start_f2.src = "images/kontakt_start_f4.gif";
  kontakt_start_f1 = new Image(67 ,11); kontakt_start_f1.src = "images/kontakt_start.gif";
  kontakt_start_f3 = new Image(67 ,11); kontakt_start_f3.src = "images/kontakt_start_f3.gif";
  links_start_f2 = new Image(44 ,11); links_start_f2.src = "images/links_start_f2.gif";
  links_start_f2 = new Image(44 ,11); links_start_f2.src = "images/links_start_f4.gif";
  links_start_f1 = new Image(44 ,11); links_start_f1.src = "images/links_start.gif";
  links_start_f3 = new Image(44 ,11); links_start_f3.src = "images/links_start_f3.gif";
  deutsch_f2 = new Image(60 ,9); deutsch_f2.src = "images/deutsch_f2.gif";
  deutsch_f2 = new Image(60 ,9); deutsch_f2.src = "images/deutsch_f4.gif";
  deutsch_f1 = new Image(60 ,9); deutsch_f1.src = "images/deutsch.gif";
  deutsch_f3 = new Image(60 ,9); deutsch_f3.src = "images/deutsch_f3.gif";
  english_f2 = new Image(54 ,11); english_f2.src = "images/english_f2.gif";
  english_f2 = new Image(54 ,11); english_f2.src = "images/english_f4.gif";
  english_f1 = new Image(54 ,11); english_f1.src = "images/english.gif";
  english_f3 = new Image(54 ,11); english_f3.src = "images/english_f3.gif";


  impulse_logo_f2 = new Image(142 ,68); impulse_logo_f2.src = "images/impulse_logo_f2.gif";
  impulse_logo_f2 = new Image(142 ,68); impulse_logo_f2.src = "images/impulse_logo_f3.gif";
  impulse_logo_f1 = new Image(142 ,68); impulse_logo_f1.src = "images/impulse_logo.gif";
  projekte_f2 = new Image(39 ,27); projekte_f2.src = "images/projekte_f2.gif";
  projekte_f2 = new Image(39 ,27); projekte_f2.src = "images/projekte_f3.gif";
  projekte_f1 = new Image(39 ,27); projekte_f1.src = "images/projekte.gif";
  methoden_f2 = new Image(91 ,27); methoden_f2.src = "images/methoden_f2.gif";
  methoden_f2 = new Image(91 ,27); methoden_f2.src = "images/methoden_f3.gif";
  methoden_f1 = new Image(91 ,27); methoden_f1.src = "images/methoden.gif";
  lehre_f2 = new Image(23 ,27); lehre_f2.src = "images/lehre_f2.gif";
  lehre_f2 = new Image(23 ,27); lehre_f2.src = "images/lehre_f3.gif";
  lehre_f1 = new Image(23 ,27); lehre_f1.src = "images/lehre.gif";
  publikationen_f2 = new Image(64 ,27); publikationen_f2.src = "images/publikationen_f2.gif";
  publikationen_f2 = new Image(64 ,27); publikationen_f2.src = "images/publikationen_f3.gif";
  publikationen_f1 = new Image(64 ,27); publikationen_f1.src = "images/publikationen.gif";
  kontakt_f2 = new Image(42 ,27); kontakt_f2.src = "images/kontakt_f2.gif";
  kontakt_f2 = new Image(42 ,27); kontakt_f2.src = "images/kontakt_f3.gif";
  kontakt_f1 = new Image(42 ,27); kontakt_f1.src = "images/kontakt.gif";
  links_f2 = new Image(22 ,27); links_f2.src = "images/links_f2.gif";
  links_f2 = new Image(22 ,27); links_f2.src = "images/links_f3.gif";
  links_f1 = new Image(22 ,27); links_f1.src = "images/links.gif";
  start_f2 = new Image(21 ,26); start_f2.src = "images/start_f2.gif";
  start_f2 = new Image(21 ,26); start_f2.src = "images/start_f3.gif";
  start_f1 = new Image(21 ,26); start_f1.src = "images/start.gif";

  ikzmbutton_f2 = new Image(40 ,8); ikzmbutton_f2.src = "images/ikzmbutton_f2.gif";
  ikzmbutton_f2 = new Image(40 ,8); ikzmbutton_f2.src = "images/ikzmbutton_f3.gif";
  ikzmbutton_f1 = new Image(40 ,8); ikzmbutton_f1.src = "images/ikzmbutton.gif";
  oelbutton_f2 = new Image(105 ,11); oelbutton_f2.src = "images/oelbutton_f2.gif";
  oelbutton_f2 = new Image(105 ,11); oelbutton_f2.src = "images/oelbutton_f3.gif";
  oelbutton_f1 = new Image(105 ,11); oelbutton_f1.src = "images/oelbutton.gif";
  maributton_f2 = new Image(60 ,8); maributton_f2.src = "images/maributton_f2.gif";
  maributton_f2 = new Image(60 ,8); maributton_f2.src = "images/maributton_f3.gif";
  maributton_f1 = new Image(60 ,8); maributton_f1.src = "images/maributton.gif";
  kabelbutton_f2 = new Image(74 ,8); kabelbutton_f2.src = "images/kabelbutton_f2.gif";
  kabelbutton_f2 = new Image(74 ,8); kabelbutton_f2.src = "images/kabelbutton_f3.gif";
  kabelbutton_f1 = new Image(74 ,8); kabelbutton_f1.src = "images/kabelbutton.gif";

  methodenbutton_f2 = new Image(60 ,8); methodenbutton_f2.src = "images/methodenbutton_f2.gif";
  methodenbutton_f2 = new Image(60 ,8); methodenbutton_f2.src = "images/methodenbutton_f3.gif";
  methodenbutton_f1 = new Image(60 ,8); methodenbutton_f1.src = "images/methodenbutton.gif";
  modellebutton_f2 = new Image(51 ,8); modellebutton_f2.src = "images/modellebutton_f2.gif";
  modellebutton_f2 = new Image(51 ,8); modellebutton_f2.src = "images/modellebutton_f3.gif";
  modellebutton_f1 = new Image(51 ,8); modellebutton_f1.src = "images/modellebutton.gif";

  wsbutton_f2 = new Image(91 ,8); wsbutton_f2.src = "../englisch/images/wsbutton_f2.gif";
  wsbutton_f2 = new Image(91 ,8); wsbutton_f2.src = "../englisch/images/wsbutton_f3.gif";
  wsbutton_f1 = new Image(91 ,8); wsbutton_f1.src = "../englisch/images/wsbutton.gif";
  ssbutton_f2 = new Image(100 ,8); ssbutton_f2.src = "../englisch/images/ssbutton_f2.gif";
  ssbutton_f2 = new Image(100 ,8); ssbutton_f2.src = "../englisch/images/ssbutton_f3.gif";
  ssbutton_f1 = new Image(100 ,8); ssbutton_f1.src = "../englisch/images/ssbutton.gif";

  veroeffbutton_f2 = new Image(98 ,10); veroeffbutton_f2.src = "images/veroeffbutton_f2.gif";
  veroeffbutton_f2 = new Image(98 ,10); veroeffbutton_f2.src = "images/veroeffbutton_f3.gif";
  veroeffbutton_f1 = new Image(98 ,10); veroeffbutton_f1.src = "images/veroeffbutton.gif";
  diplbutton_f2 = new Image(83 ,10); diplbutton_f2.src = "images/diplbutton_f2.gif";
  diplbutton_f2 = new Image(83 ,10); diplbutton_f2.src = "images/diplbutton_f3.gif";
  diplbutton_f1 = new Image(83 ,10); diplbutton_f1.src = "images/diplbutton.gif";
  presbutton_f2 = new Image(83 ,10); presbutton_f2.src = "images/presbutton_f2.gif";
  presbutton_f2 = new Image(83 ,10); presbutton_f2.src = "images/presbutton_f3.gif";
  diplpresbutton_f1 = new Image(83 ,10); presbutton_f1.src = "images/presbutton.gif";
  
  kontaktbutton_f2 = new Image(50 ,8); kontaktbutton_f2.src = "images/kontaktbutton_f2.gif";
  kontaktbutton_f2 = new Image(50 ,8); kontaktbutton_f2.src = "images/kontaktbutton_f3.gif";
  kontaktbutton_f1 = new Image(50 ,8); kontaktbutton_f1.src = "images/kontaktbutton.gif";
  mitarbeiterbutton_f2 = new Image(63 ,8); mitarbeiterbutton_f2.src = "images/mitarbeiterbutton_f2.gif";
  mitarbeiterbutton_f2 = new Image(63 ,8); mitarbeiterbutton_f2.src = "images/mitarbeiterbutton_f3.gif";
  mitarbeiterbutton_f1 = new Image(63 ,8); mitarbeiterbutton_f1.src = "images/mitarbeiterbutton.gif";
  anfahrtbutton_f2 = new Image(49 ,8); anfahrtbutton_f2.src = "images/anfahrtbutton_f2.gif";
  anfahrtbutton_f2 = new Image(49 ,8); anfahrtbutton_f2.src = "images/anfahrtbutton_f3.gif";
  anfahrtbutton_f1 = new Image(49 ,8); anfahrtbutton_f1.src = "images/anfahrtbutton.gif";

  nationalbutton_f2 = new Image(52 ,8); nationalbutton_f2.src = "images/nationalbutton_f2.gif";
  nationalbutton_f2 = new Image(52 ,8); nationalbutton_f2.src = "images/nationalbutton_f3.gif";
  nationalbutton_f1 = new Image(52 ,8); nationalbutton_f1.src = "images/nationalbutton.gif";
  internationalbutton_f2 = new Image(71 ,8); internationalbutton_f2.src = "images/internationalbutton_f2.gif";
  internationalbutton_f2 = new Image(71 ,8); internationalbutton_f2.src = "images/internationalbutton_f3.gif";
  internationalbutton_f1 = new Image(71 ,8); internationalbutton_f1.src = "images/internationalbutton.gif";
  }