if (document.images) {  
  Aimson = new Image(); Aimson.src = "img/JDnv_on_02.jpg"; Aimsoff = new Image(); Aimsoff.src = "img/JDnv_02.jpg";
  Strucon = new Image(); Strucon.src = "img/JDnv_on_03.jpg"; Strucoff = new Image(); Strucoff.src = "img/JDnv_03.jpg";
  Posteron = new Image(); Posteron.src = "img/Poster_on.gif"; Posteroff = new Image(); Posteroff.src = "img/Poster_off.gif";
  Progon = new Image(); Progon.src = "img/JDnv_on_04.jpg"; Progoff = new Image(); Progoff.src = "img/JDnv_04.jpg";
  SOCon = new Image(); SOCon.src = "img/JDnv_on_05.jpg"; SOCoff = new Image(); SOCoff.src = "img/JDnv_05.jpg";
  Venueon = new Image(); Venueon.src = "img/JDnv_on_06.jpg"; Venueoff = new Image(); Venueoff.src = "img/JDnv_06.jpg";
  Registron = new Image(); Registron.src = "img/JDnv_on_07.jpg"; Registroff = new Image(); Registroff.src = "img/JDnv_07.jpg";
  Partion = new Image(); Partion.src = "img/JDnv_on_08.jpg"; Partioff = new Image(); Partioff.src = "img/JDnv_08.jpg";
  Procon = new Image(); Procon.src = "img/JDnv_on_09.jpg"; Procoff = new Image(); Procoff.src = "img/JDnv_09.jpg";
  Homeon = new Image(); Homeon.src = "img/hm_on_01.jpg"; Homeoff = new Image(); Homeoff.src = "img/hm_01.jpg";
  Contacton = new Image(); Contacton.src = "img/hm_on_02.jpg"; Contactoff = new Image(); Contactoff.src = "img/hm_02.jpg";
  IAUon = new Image(); IAUon.src = "img/hm_on_03.jpg"; IAUoff = new Image(); IAUoff.src = "img/hm_03.jpg";
  GAon = new Image(); GAon.src = "img/hm_on_04.jpg"; GAoff = new Image(); GAoff.src = "img/hm_04.jpg";
 }
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");
    }
  }
}