// JavaScript Document
if(document.images)
  {
    pic1on=new Image();
    pic1on.src="images/home_ov.gif";
    pic1off=new Image();
    pic1off.src="images/home.gif";

    pic2on=new Image();
    pic2on.src="images/contact_ov.gif";
    pic2off=new Image();
    pic2off.src="images/contact.gif";

    pic3on=new Image();
    pic3on.src="images/news_ov.gif";
    pic3off=new Image();
    pic3off.src="images/news.gif";

    pic4on=new Image();
    pic4on.src="images/social_ov.gif";
    pic4off=new Image();
    pic4off.src="images/social.gif";
}
  function lightup(imgName)
    {
//    does the browser support images?
      if(document.images)
      {
        imgOn=eval(imgName + "on.src");
        document[imgName].src = imgOn; 
      }
      }

function turnoff(imgName)
    {
//    does the browser support images?
      if(document.images)
      {
        imgOff=eval(imgName + "off.src");
        document[imgName].src = imgOff; 
      }
      }