if (document.images) {
  about = new Image();
  about.src = "http://www.fsc.edu/community/images/template/nav/about.gif";
  about_on = new Image();
  about_on.src = "http://www.fsc.edu/community/images/template/nav/about_on.gif";

  admissions = new Image();
  admissions.src = "http://www.fsc.edu/community/images/template/nav/admissions.gif";
  admissions_on = new Image();
  admissions_on.src = "http://www.fsc.edu/community/images/template/nav/admissions_on.gif";

  academics = new Image();
  academics.src = "http://www.fsc.edu/community/images/template/nav/academics.gif";
  academics_on = new Image();
  academics_on.src = "http://www.fsc.edu/community/images/template/nav/academics_on.gif";

  alumni = new Image();
  alumni.src = "http://www.fsc.edu/community/images/template/nav/alumni.gif";
  alumni_on = new Image();
  alumni_on.src = "http://www.fsc.edu/community/images/template/nav/alumni_on.gif";
  
  athletics = new Image();
  athletics.src = "http://www.fsc.edu/community/images/template/nav/athletics.gif";
  athletics_on = new Image();
  athletics_on.src = "http://www.fsc.edu/community/images/template/nav/athletics_on.gif";
  
  offices_services = new Image();
  offices_services.src = "http://www.fsc.edu/community/images/template/nav/offices_services.gif";
  offices_services_on = new Image();
  offices_services_on.src = "http://www.fsc.edu/community/images/template/nav/offices_services_on.gif";
  
  news_events = new Image();
  news_events.src = "http://www.fsc.edu/community/images/template/nav/news_events.gif";
  news_events_on = new Image();
  news_events_on.src = "http://www.fsc.edu/community/images/template/nav/news_events_on.gif";
  
  student_life = new Image();
  student_life.src = "http://www.fsc.edu/community/images/template/nav/student_life.gif";
  student_life_on = new Image();
  student_life_on.src = "http://www.fsc.edu/community/images/template/nav/student_life_on.gif";
  
}

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");
    }
}