if (document.images){

  serviceblok1     = new Image ();
  serviceblok1.src = "images/icon_01.gif";

  serviceblok1_over     = new Image ();
  serviceblok1_over.src = "images/icon_01_hl.gif";

  serviceblok2     = new Image ();
  serviceblok2.src = "images/icon_02.gif";

  serviceblok2_over     = new Image ();
  serviceblok2_over.src = "images/icon_02_hl.gif";

	serviceblok3     = new Image ();
  serviceblok3.src = "images/icon_03.gif";

  serviceblok3_over     = new Image ();
  serviceblok3_over.src = "images/icon_03_hl.gif";

	serviceblok4     = new Image ();
  serviceblok4.src = "images/icon_04.gif";

  serviceblok4_over     = new Image ();
  serviceblok4_over.src = "images/icon_04_hl.gif";

	teaser_verder1     = new Image ();
  teaser_verder1.src = "images/teaser_verder.gif";

  teaser_verder1_over     = new Image ();
  teaser_verder1_over.src = "images/teaser_verder_hl.gif";

	teaser_verder2     = new Image ();
  teaser_verder2.src = "images/teaser_verder.gif";

	teaser_verder2_over     = new Image ();
  teaser_verder2_over.src = "images/teaser_verder_hl.gif";

  teaser_verder3     = new Image ();
  teaser_verder3.src = "images/teaser_verder.gif";

  teaser_verder3_over     = new Image ();
  teaser_verder3_over.src = "images/teaser_verder_hl.gif";
}

// this function swaps the images
function swapImage(oldButton,newButton){
   if (document.images)
      document.images[oldButton].src=eval(newButton + ".src");
}

function swapTextLangSwitch(lang) {
  text_nl = "nederlandse versie";
  text_uk = "english version";
  text_du = "deutsche version";
  if (lang == 'uk') {
    document.getElementById("langswitch_hovertext").innerHTML = text_uk;
  } else if (lang == 'du') {
    document.getElementById("langswitch_hovertext").innerHTML = text_du;
  } else if (lang == 'nl') {
    document.getElementById("langswitch_hovertext").innerHTML = text_nl;
  } else if (lang == '') {
    document.getElementById("langswitch_hovertext").innerHTML = "";
  }   
}