if (document.images)  {

logoON = new Image(142,30);
logoON.src = "img/logo_on.jpg";
logoOFF = new Image(142,30);
logoOFF.src = "img/logo.jpg";

homeON = new Image(142,30);
homeON.src = "img/nav_home_on.gif";
homeOFF = new Image(142,30);
homeOFF.src = "img/nav_home.gif";

aboutON = new Image(142,30);
aboutON.src = "img/nav_about_on.gif";
aboutOFF = new Image(142,30);
aboutOFF.src = "img/nav_about.gif";

servicesON = new Image(142,30);
servicesON.src = "img/nav_services_on.gif";
servicesOFF = new Image(142,30);
servicesOFF.src = "img/nav_services.gif";

reachON = new Image(142,30);
reachON.src = "img/nav_reach_on.gif";
reachOFF = new Image(142,30);
reachOFF.src = "img/nav_reach.gif";

contactON = new Image(142,30);
contactON.src = "img/nav_contact_on.gif";
contactOFF = new Image(142,30);
contactOFF.src = "img/nav_contact.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");
    }
  }
}

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