if (document.images) {

  the_theme_root = "/wp-content/themes/1492";

  btn_contact_us = new Image();
  btn_contact_us.src = the_theme_root + "/images/hpl_contact.jpg";
  btn_contact_us_on = new Image();
  btn_contact_us_on.src = the_theme_root + "/images/hpl_contact_roll.jpg";
  
  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_leadership_development = new Image();
  btn_leadership_development.src = the_theme_root + "/images/btn_leadership_development.jpg";
  btn_leadership_development_on = new Image();
  btn_leadership_development_on.src = the_theme_root + "/images/btn_leadership_development_on.jpg";
  
  btn_lean_improvement = new Image();
  btn_lean_improvement.src = the_theme_root + "/images/btn_lean_improvement.jpg";
  btn_lean_improvement_on = new Image();
  btn_lean_improvement_on.src = the_theme_root + "/images/btn_lean_improvement_on.jpg";

  btn_conflict_and_communications = new Image();
  btn_conflict_and_communications.src = the_theme_root + "/images/btn_conflict_and_communications.jpg";
  btn_conflict_and_communications_on = new Image();
  btn_conflict_and_communications_on.src = the_theme_root + "/images/btn_conflict_and_communications_on.jpg";

  btn_change_management = new Image();
  btn_change_management.src = the_theme_root + "/images/btn_change_management.jpg";
  btn_change_management_on = new Image();
  btn_change_management_on.src = the_theme_root + "/images/btn_change_management_on.jpg";

  btn_assessments_and_coaching = new Image();
  btn_assessments_and_coaching.src = the_theme_root + "/images/btn_assessments_and_coaching.jpg";
  btn_assessments_and_coaching_on = new Image();
  btn_assessments_and_coaching_on.src = the_theme_root + "/images/btn_assessments_and_coaching_on.jpg";

  btn_sales_and_customer_service = new Image();
  btn_sales_and_customer_service.src = the_theme_root + "/images/btn_sales_and_customer_service.jpg";
  btn_sales_and_customer_service_on = new Image();
  btn_sales_and_customer_service_on.src = the_theme_root + "/images/btn_sales_and_customer_service_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");
    }
}