if (document.images) {
  	about = new Image();
  	about.src = "/images/navbar/about.gif";
  	about_on = new Image();
  	about_on.src = "/images/navbar/about_on.gif";
  	
  	news_events = new Image();
  	news_events.src = "/images/navbar/news_events.gif";
  	news_events_on = new Image();
  	news_events_on.src = "/images/navbar/news_events_on.gif";
  
  	tech_support = new Image();
  	tech_support.src = "/images/navbar/tech_support.gif";
  	tech_support_on = new Image();
  	tech_support_on.src = "/images/navbar/tech_support_on.gif";
  
	distributor = new Image();
  	distributor.src = "/images/navbar/distributor.gif";
  	distributor_on = new Image();
  	distributor_on.src = "/images/navbar/distributor_on.gif";

	applications = new Image();
  	applications.src = "/images/navbar/applications.gif";
  	applications_on = new Image();
  	applications_on.src = "/images/navbar/applications_on.gif";
	
	videos = new Image();
  	videos.src = "/images/navbar/videos.gif";
  	videos_on = new Image();
  	videos_on.src = "/images/navbar/videos_on.gif";

	contact = new Image();
  	contact.src = "/images/navbar/contact.gif";
  	contact_on = new Image();
  	contact_on.src = "/images/navbar/contact_on.gif";
  	
  	products = new Image();
  	products.src = "/images/navbar/products.gif";
  	products_on = new Image();
  	products_on.src = "/images/navbar/products_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");
    }
}