// these are the nav images
 
 if (document.images)
 

	{
	homeOn= new Image(56,12);
	homeOn.src="images/nav_image_a.gif";
	homeOff= new Image(56,12);
	homeOff.src="images/navover_image_a.gif";
	}
	{
	contactOn= new Image(56,12);
	contactOn.src="images/nav_image_h.gif";
	contactOff= new Image(56,12);
	contactOff.src="images/navover_image_h.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;
    }
 }