// these are the nav images
 
 if (document.images)
 
 	{
	navover_homeOn= new Image(56,12);		
	navover_homeOn.src="images/nav/navover_home.gif";
	navover_homeOff= new Image(56,12);		
	navover_homeOff.src="images/nav/nav_home.gif";
	} 
 	{
	navover_aboutOn= new Image(56,12);		
	navover_aboutOn.src="images/nav/navover_about.gif";
	navover_aboutOff= new Image(56,12);		
	navover_aboutOff.src="images/nav/nav_about.gif";
	} 
 	{
	navover_guideOn= new Image(56,12);		
	navover_guideOn.src="images/nav/navover_guide.gif";
	navover_guideOff= new Image(56,12);		
	navover_guideOff.src="images/nav/nav_guide.gif";
	} 
 	{
	navover_subOn= new Image(56,12);		
	navover_subOn.src="images/nav/navover_sub.gif";
	navover_subOff= new Image(56,12);		
	navover_subOff.src="images/nav/nav_sub.gif";
	} 
 	{
	navover_awardOn= new Image(56,12);		
	navover_awardOn.src="images/nav/navover_award.gif";
	navover_awardOff= new Image(56,12);		
	navover_awardOff.src="images/nav/nav_award.gif";
	} 
 

//this is the function  
 
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;
    }
 }