if (document.images) {
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  productson.src = "images/nav/menu/bttn_R1products_on.jpg";
  productsoff = new Image();
  productsoff.src = "images/nav/menu/bttn_R1products_off.jpg";
  
  serviceson = new Image();
  serviceson.src = "images/nav/menu/bttn_R1services_on.jpg";
  servicesoff = new Image();
  servicesoff.src = "images/nav/menu/bttn_R1services_off.jpg";
  
  applicationson = new Image();
  applicationson.src = "images/nav/menu/bttn_R1applications_on.jpg";
  applicationsoff = new Image();
  applicationsoff.src = "images/nav/menu/bttn_R1applications_off.jpg";
  
  newseventson = new Image();
  newseventson.src = "images/nav/menu/bttn_R2news_on.jpg";
  newseventsoff = new Image();
  newseventsoff.src = "images/nav/menu/bttn_R2news_off.jpg";
  
  faqon = new Image();
  faqon.src = "images/nav/menu/bttn_R2faq_on.jpg";
  faqoff = new Image();
  faqoff.src = "images/nav/menu/bttn_R2faq_off.jpg";
  
  employmenton = new Image();
  employmenton.src = "images/nav/menu/bttn_R2employment_on.jpg";
  employmentoff = new Image();
  employmentoff.src = "images/nav/menu/bttn_R2employment_off.jpg";
  
  aboutuson = new Image();
  aboutuson.src = "images/nav/menu/bttn_R2aboutus_on.jpg";
  aboutusoff = new Image();
  aboutusoff.src = "images/nav/menu/bttn_R2aboutus_off.jpg";
  
  contactuson = new Image();
  contactuson.src = "images/nav/menu/bttn_R2contactus_on.jpg";
  contactusoff = new Image();
  contactusoff.src = "images/nav/menu/bttn_R2contactus_off.jpg";
  
  homeon = new Image();
  homeon.src = "images/nav/menu/bttn_R1home_on.jpg";
  homeoff = new Image();
  homeoff.src = "images/nav/menu/bttn_R1home_off.jpg";
  
  product_literatureon = new Image();
  product_literatureon.src = "images/nav/menu/bttn_R1reference_on.jpg";
  product_literatureoff = new Image();
  product_literatureoff.src = "images/nav/menu/bttn_R1reference_off.jpg";
  
  videolibraryon = new Image();
  videolibraryon.src = "images/nav/menu/bttn_R1vlibrary_on.jpg";
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  videolibraryoff.src = "images/nav/menu/bttn_R1vlibrary_off.jpg";
  
}


function changeImages() {
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}