if (document.images)
   {
/* Home Navigation  */
	 aboutOn= new Image(116,21);
     aboutOn.src="images/home/navAboutOn.gif";
	 
	 MMAOn= new Image(116,35);
	 MMAOn.src="images/home/navMMAOn.GIF";
	 
     usptfOn= new Image(116,35); 
     usptfOn.src="images/home/navUsptfOn.gif"; 
	 
	 derpOn= new Image(116,35); 
     derpOn.src="images/home/navDerpOn.gif"; 
	 
	 fdaOn= new Image(116,20); 
     fdaOn.src="images/home/navFdaFoodClaimsOn.gif"; 
	 
	 PainOn= new Image (116, 35);
	 PainOn.src="images/home/navPainOn.gif";
	 
	 otherProjectsOn= new Image(116,20); 
     otherProjectsOn.src="images/home/navOtherProjectsOn.gif"; 
	 
	 pastProjectsOn= new Image(116,20); 
     pastProjectsOn.src="images/home/navPastProjectsOn.gif"; 
	 
	 publicationsOn= new Image(116,20); 
     publicationsOn.src="images/home/navPublicationsOn.gif"; 
	 
	 contactOn= new Image(116,19); 
     contactOn.src="images/home/navContactOn.gif"; 
	 
     
	 aboutOff= new Image(116,21);
     aboutOff.src="images/home/navAbout.gif";
	 
	 MMAOff= new Image(116,35);
	 MMAOff.src="images/home/navMMA.gif";
	 
     usptfOff= new Image(116,35);
     usptfOff.src="images/home/navUsptf.gif";
	 
	 derpOff= new Image(116,35);
     derpOff.src="images/home/navDerp.gif"; 
	 
	 fdaOff= new Image(116,20);
     fdaOff.src="images/home/navFdaFoodClaims.gif"; 
	 
	 otherProjectsOff= new Image(116,20);
     otherProjectsOff.src="images/home/navOtherProjects.gif"; 
	 
	 PainOff= new Image (116, 35);
	 PainOff.src="images/home/navPain.gif";
	 
	 pastProjectsOff= new Image(116,20);
     pastProjectsOff.src="images/home/navPastProjects.gif"; 
	 
	 publicationsOff= new Image(116,20);
     publicationsOff.src="images/home/navPublications.gif"; 
	 
	 contactOff= new Image(116,19);
     contactOff.src="images/home/navContact.gif"; 
	 
	 
	/* Sub Navigation  */
	 aboutSubOn= new Image(148,21);
     aboutSubOn.src="../images/sub/navAboutOn.gif";  
	 
 	 MMASubOn= new Image(148,35);
	 MMASubOn.src="../images/sub/navMMAOn.gif";
	 
     usptfSubOn= new Image(148,35); 
     usptfSubOn.src="../images/sub/navUsptfOn.gif"; 
	 
	 derpSubOn= new Image(148,35); 
     derpSubOn.src="../images/sub/navDerpOn.gif"; 
	 
	 fdaSubOn= new Image(148,20); 
     fdaSubOn.src="../images/sub/navFdaFoodClaimsOn.gif"; 
	 
	 otherProjectsSubOn= new Image(148,20); 
     otherProjectsSubOn.src="../images/sub/navOtherProjectsOn.gif"; 
	 
	 PainSubOn= new Image (148, 35);
	 PainSubOn.src="../images/sub/navPainOn.gif";
	 
	 pastProjectsSubOn= new Image(148,20); 
     pastProjectsSubOn.src="../images/sub/navPastProjectsOn.gif"; 
	 
	 publicationsSubOn= new Image(148,20); 
     publicationsSubOn.src="../images/sub/navPublicationsOn.gif"; 
	 
	 contactSubOn= new Image(148,19); 
     contactSubOn.src="../images/sub/navContactOn.gif"; 
	 
	 homeOn= new Image(148,21);
     homeOn.src="../images/sub/navHomeOn.gif";
	 
	 
	 aboutSubOff= new Image(148,21);
     aboutSubOff.src="../images/sub/navAbout.gif";
	 
 	 MMASubOff= new Image(148,35);
	 MMASubOff.src="../images/sub/navMMA.gif";
	 
     usptfSubOff= new Image(148,35);
     usptfSubOff.src="../images/sub/navUsptf.gif";
	 
	 derpSubOff= new Image(148,35);
     derpSubOff.src="../images/sub/navDerp.gif"; 
	 
	 fdaSubOff= new Image(148,20);
     fdaSubOff.src="../images/sub/navFdaFoodClaims.gif"; 
	 
	 otherProjectsSubOff= new Image(148,20);
     otherProjectsSubOff.src="../images/sub/navOtherProjects.gif"; 
	 
	 PainSubOff= new Image (148, 35);
	 PainSubOff.src="../images/sub/navPain.gif";
	 
	 pastProjectsSubOff= new Image(148,20);
     pastProjectsSubOff.src="../images/sub/navPastProjects.gif"; 
	 
	 publicationsSubOff= new Image(148,20);
     publicationsSubOff.src="../images/sub/navPublications.gif"; 
	 
	 contactSubOff= new Image(148,19);
     contactSubOff.src="../images/sub/navContact.gif";  
	 
  	 homeOff= new Image(148,21);
     homeOff.src="../images/sub/navHome.gif";

   }

function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=eval(imgName + "On.src");
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff=eval(imgName + "Off.src");
      document[imgName].src= imgOff;
    }
 }