if (document.images) {

  aproposon = new Image();
  aproposon.src = "/images/publicsspec/boutons/publicsspec/outils/apropos_On.gif";

  realisationon = new Image();
  realisationon.src = "/images/publicsspec/boutons/publicsspec/outils/realisation_On.gif";

  rechercheon = new Image();
  rechercheon.src = "/images/publicsspec/boutons/publicsspec/outils/recherche_On.gif";

  aideon = new Image();
  aideon.src = "/images/publicsspec/boutons/publicsspec/outils/aide_On.gif";

  contacton = new Image();
  contacton.src = "/images/publicsspec/boutons/publicsspec/outils/contact_On.gif";

  droiton = new Image();
  droiton.src = "/images/publicsspec/outils/droit_On.gif";

  aproposoff = new Image();
  aproposoff.src = "/images/publicsspec/boutons/publicsspec/outils/apropos.gif";

  realisationoff = new Image();
  realisationoff.src = "/images/publicsspec/boutons/publicsspec/outils/realisation.gif";

  rechercheoff = new Image();
  rechercheoff.src = "/images/publicsspec/boutons/publicsspec/outils/recherche.gif";

  aideoff = new Image();
  aideoff.src = "/images/publicsspec/boutons/publicsspec/outils/aide.gif";

  contactoff = new Image();
  contactoff.src = "/images/publicsspec/boutons/publicsspec/outils/contact.gif";

  droitoff = new Image();
  droitoff.src = "/images/publicsspec/outils/droit.gif";

}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}