if (document.images) {
  btn_about_jay_forte = new Image();
  btn_about_jay_forte.src = theme_root + "images/btn_about_jay_forte.jpg";
  btn_about_jay_forte_on = new Image();
  btn_about_jay_forte_on.src = theme_root + "images/btn_about_jay_forte_on.jpg";
  
  btn_programs_keynotes = new Image();
  btn_programs_keynotes.src = theme_root + "images/btn_programs_keynotes.jpg";
  btn_programs_keynotes_on = new Image();
  btn_programs_keynotes_on.src = theme_root + "images/btn_programs_keynotes_on.jpg";
  
  btn_resources_articles = new Image();
  btn_resources_articles.src = theme_root + "images/btn_resources_articles.jpg";
  btn_resources_articles_on = new Image();
  btn_resources_articles_on.src = theme_root + "images/btn_resources_articles_on.jpg";
  
  btn_podcasts = new Image();
  btn_podcasts.src = theme_root + "images/btn_podcasts.jpg";
  btn_podcasts_on = new Image();
  btn_podcasts_on.src = theme_root + "images/btn_podcasts_on.jpg";
  
  btn_success_stories = new Image();
  btn_success_stories.src = theme_root + "images/btn_success_stories.jpg";
  btn_success_stories_on = new Image();
  btn_success_stories_on.src = theme_root + "images/btn_success_stories_on.jpg";
 
  btn_products = new Image();
  btn_products.src = theme_root + "images/btn_products.jpg";
  btn_products_on = new Image();
  btn_products_on.src = theme_root + "images/btn_products_on.jpg";
  
  btn_media_page = new Image();
  btn_media_page.src = theme_root + "images/btn_media_page.jpg";
  btn_media_page_on = new Image();
  btn_media_page_on.src = theme_root + "images/btn_media_page_on.jpg";
  
  btn_mindflash = new Image();
  btn_mindflash.src = theme_root + "images/btn_mindflash_off.jpg";
  btn_mindflash_on = new Image();
  btn_mindflash_on.src = theme_root + "images/btn_mindflash_on.jpg";

  btn_for_managers = new Image();
  btn_for_managers.src = theme_root + "images/btn_for_managers.jpg";
  btn_for_managers_on = new Image();
  btn_for_managers_on.src = theme_root + "images/btn_for_managers_on.jpg";

  btn_for_employees = new Image();
  btn_for_employees.src = theme_root + "images/btn_for_employees.jpg";
  btn_for_employees_on = new Image();
  btn_for_employees_on.src = theme_root + "images/btn_for_employees_on.jpg";

  btn_for_women = new Image();
  btn_for_women.src = theme_root + "images/btn_for_women.jpg";
  btn_for_women_on = new Image();
  btn_for_women_on.src = theme_root + "images/btn_for_women_on.jpg";
  
  btn_for_individuals = new Image();
  btn_for_individuals.src = theme_root + "images/btn_for_individuals.jpg";
  btn_for_individuals_on = new Image();
  btn_for_individuals_on.src = theme_root + "images/btn_for_individuals_on.jpg";
}

function switchOn(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + "_on.src");
    }
}
  
function switchOff(imgName) {
    if (document.images) {
      document[imgName].src = eval(imgName + ".src");
    }
}