// JavaScript Document
  if (document.images)
   {
     pic1on= new Image();
     pic1on.src="http://www.contrastdesign.co.uk/graphics/navRollOver.gif";  
	      pic1off= new Image();
     pic1off.src="http://www.contrastdesign.co.uk/graphics/navRollNorm.gif";  
   }


function lightup(imgName)
 {
   if (document.images)
    {
      imgOn=pic1on.src;
      document[imgName].src= imgOn;
    }
 }

function turnoff(imgName)
 {
   if (document.images)
    {
      imgOff= pic1off.src;
      document[imgName].src= imgOff;
    }
 }