if (document.images) {

  the_theme_root = "/wp-content/themes/goodwin";
  btn_about_us = new Image();
  btn_about_us.src = the_theme_root + "/images/btn_about_us.jpg";
  btn_about_us_on = new Image();
  btn_about_us_on.src = the_theme_root + "/images/btn_about_us_on.jpg";
  
  btn_services = new Image();
  btn_services.src = the_theme_root + "/images/btn_services.jpg";
  btn_services_on = new Image();
  btn_services_on.src = the_theme_root + "/images/btn_services_on.jpg";
  
  btn_clinics_and_testing = new Image();
  btn_clinics_and_testing.src = the_theme_root + "/images/btn_clinics_and_testing.jpg";
  btn_clinics_and_testing_on = new Image();
  btn_clinics_and_testing_on.src = the_theme_root + "/images/btn_clinics_and_testing_on.jpg";
    
  btn_employment = new Image();
  btn_employment.src = the_theme_root + "/images/btn_employment.jpg";
  btn_employment_on = new Image();
  btn_employment_on.src = the_theme_root + "/images/btn_employment_on.jpg";
    
  btn_volunteer = new Image();
  btn_volunteer.src = the_theme_root + "/images/btn_volunteer.jpg";
  btn_volunteer_on = new Image();
  btn_volunteer_on.src = the_theme_root + "/images/btn_volunteer_on.jpg";
    
  btn_events = new Image();
  btn_events.src = the_theme_root + "/images/btn_events.jpg";
  btn_events_on = new Image();
  btn_events_on.src = the_theme_root + "/images/btn_events_on.jpg";
    
  btn_news = new Image();
  btn_news.src = the_theme_root + "/images/btn_news.jpg";
  btn_news_on = new Image();
  btn_news_on.src = the_theme_root + "/images/btn_news_on.jpg";
    
  btn_help_us_by_donating = new Image();
  btn_help_us_by_donating.src = the_theme_root + "/images/btn_help_us_by_donating.jpg";
  btn_help_us_by_donating_on = new Image();
  btn_help_us_by_donating_on.src = the_theme_root + "/images/btn_help_us_by_donating_on.jpg";
    
  btn_volunteer_your_time = new Image();
  btn_volunteer_your_time.src = the_theme_root + "/images/btn_volunteer_your_time.jpg";
  btn_volunteer_your_time_on = new Image();
  btn_volunteer_your_time_on.src = the_theme_root + "/images/btn_volunteer_your_time_on.jpg";
    
  btn_sign_up_for_our_newsletter = new Image();
  btn_sign_up_for_our_newsletter.src = the_theme_root + "/images/btn_sign_up_for_our_newsletter.jpg";
  btn_sign_up_for_our_newsletter_on = new Image();
  btn_sign_up_for_our_newsletter_on.src = the_theme_root + "/images/btn_sign_up_for_our_newsletter_on.jpg";
    
  btn_join_our_news_feed = new Image();
  btn_join_our_news_feed.src = the_theme_root + "/images/btn_join_our_news_feed.jpg";
  btn_join_our_news_feed_on = new Image();
  btn_join_our_news_feed_on.src = the_theme_root + "/images/btn_join_our_news_feed_on.jpg";
  
  btn_donate_to_avis_goodwin = new Image();
  btn_donate_to_avis_goodwin.src = the_theme_root + "/images/btn_donate_to_avis_goodwin.jpg";
  btn_donate_to_avis_goodwin_on = new Image();
  btn_donate_to_avis_goodwin_on.src = the_theme_root + "/images/btn_donate_to_avis_goodwin_on.jpg";
  
  btn_volunteer_today = new Image();
  btn_volunteer_today.src = the_theme_root + "/images/btn_volunteer_today.jpg";
  btn_volunteer_today_on = new Image();
  btn_volunteer_today_on.src = the_theme_root + "/images/btn_volunteer_today_on.jpg";
  
  btn_visit_one_of_our_facilities = new Image();
  btn_visit_one_of_our_facilities.src = the_theme_root + "/images/btn_visit_one_of_our_facilities.jpg";
  btn_visit_one_of_our_facilities_on = new Image();
  btn_visit_one_of_our_facilities_on.src = the_theme_root + "/images/btn_visit_one_of_our_facilities_on.jpg";
  
  btn_content_help_us_by_donating = new Image();
  btn_content_help_us_by_donating.src = the_theme_root + "/images/btn_content_help_us_by_donating.jpg";
  btn_content_help_us_by_donating_on = new Image();
  btn_content_help_us_by_donating_on.src = the_theme_root + "/images/btn_content_help_us_by_donating_on.jpg";
  
  btn_content_volunteer_your_time = new Image();
  btn_content_volunteer_your_time.src = the_theme_root + "/images/btn_content_volunteer_your_time.jpg";
  btn_content_volunteer_your_time_on = new Image();
  btn_content_volunteer_your_time_on.src = the_theme_root + "/images/btn_content_volunteer_your_time_on.jpg";
  
  btn_content_newsletter_sign_up = new Image();
  btn_content_newsletter_sign_up.src = the_theme_root + "/images/btn_content_newsletter_sign_up.jpg";
  btn_content_newsletter_sign_up_on = new Image();
  btn_content_newsletter_sign_up_on.src = the_theme_root + "/images/btn_content_newsletter_sign_up_on.jpg";
  
  btn_content_join_our_news_feed = new Image();
  btn_content_join_our_news_feed.src = the_theme_root + "/images/btn_content_join_our_news_feed.jpg";
  btn_content_join_our_news_feed_on = new Image();
  btn_content_join_our_news_feed_on.src = the_theme_root + "/images/btn_content_join_our_news_feed_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");
    }
}