// pre-load main navigation rollover images
if (document.images) {
  home_esp_on = new Image(); home_esp_off = new Image(); 
  image1_on = new Image(); image1_off = new Image(); 
  about_esp_on = new Image(); about_esp_off = new Image(); 
  services_esp_on = new Image(); services_esp_off = new Image(); 
  image2_on = new Image(); image2_off = new Image(); 
  image3_on = new Image(); image3_off = new Image(); 
  contact_esp_on = new Image(); contact_esp_off = new Image(); 
  login_esp_on = new Image(); login_esp_off = new Image(); 

  home_esp_on.src = "Images/button0_home_esp-over.gif"; home_esp_off.src = "Images/button0_home_esp-off.gif";
  image1_on.src = "Images/button2_porque_esp-over.gif"; image1_off.src = "Images/button2_porque_esp-off.gif";
  about_esp_on.src = "Images/button3_acerca_esp-over.gif"; about_esp_off.src = "Images/button3_acerca_esp-off.gif";
  services_esp_on.src = "Images/button4_servicios_esp-over.gif"; services_esp_off.src = "Images/button4_servicios_esp-off.gif";
  image2_on.src = "Images/button5_equipo_esp-over.gif"; image2_off.src = "Images/button5_equipo_esp-off.gif";
  image3_on.src = "Images/button5_articulos_esp-over.gif"; image3_off.src = "Images/button5_articulos_esp-off.gif";
  contact_esp_on.src = "Images/button6_contacto_esp-over.gif"; contact_esp_off.src = "Images/button6_contacto_esp-off.gif";
  login_esp_on.src = "Images/button7_login_esp-over.gif"; login_esp_off.src = "Images/button7_login_esp-off.gif";
}

var theActiveImage = 'home_esp';
// rollover functions
function on(imageName) {
  // making sure the previous image is off
  if (document.images) document[theActiveImage].src = eval(theActiveImage + "_off.src");
  if (document.images) document[imageName].src = eval(imageName + "_off.src");
  // also hiding the hover menu
  hideActiveMenus();
  theActiveImage = imageName;
  if (document.images) document[imageName].src = eval(imageName + "_on.src");
}

function off() {
  if(!window.ActiveMenu || window.activeMenus.length == 0) {
    if (document.images) document[theActiveImage].src = eval(theActiveImage + "_off.src");
  }
}
function hardOff() {
  if (document.images) document[theActiveImage].src = eval(theActiveImage + "_off.src");
}