if (document.images)
   {
     //side nav rollovers
	 
	 pic1on= new Image();
     pic1on.src="images/home_on.gif";  

     pic1off= new Image();
     pic1off.src="images/home_off.gif";
  		
   	 pic2on= new Image();
     pic2on.src="images/episode_guide_on.gif";  

     pic2off= new Image();
     pic2off.src="images/episode_guide_off.gif";
    
	 pic3on= new Image();
     pic3on.src="images/meet_the_doc_on.gif";  

     pic3off= new Image();
     pic3off.src="images/meet_the_doc_off.gif";
  
   	 pic4on= new Image();
     pic4on.src="images/tips_treats_on.gif";  

     pic4off= new Image();
     pic4off.src="images/tips_treats_off.gif";
	 
     pic5on= new Image();
     pic5on.src="images/community_on.gif";  

     pic5off= new Image();
     pic5off.src="images/community_off.gif";
     
	 pic6on= new Image();
     pic6on.src="images/credits_on.gif";  

     pic6off= new Image();
     pic6off.src="images/credits_off.gif";
   
   	 pic7on= new Image();
     pic7on.src="images/competiton_on.gif";  

     pic7off= new Image();
     pic7off.src="images/competiton_off.gif";
   
   }

function turnon(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;
    }
 }