function NavBar(uri) {
 var baseuri = uri;
 var products = new RollOverImage('products');
 var services = new RollOverImage('services');
 var about = new RollOverImage('about');
 var support = new RollOverImage('support');
 var news = new RollOverImage('news');

 function RollOverImage(id) {
  var rollover = new Image();
  rollover.src = baseuri+'images/'+id+'on.gif';
  try {
   var dom = document.getElementById(id);
   var image = dom.firstChild;
   var src = image.src;
   dom.onmouseover = OnMouseOver;
   dom.onmouseout = OnMouseOut; 
  } catch (e) { }
  function OnMouseOver(e) {
   image.src = rollover.src;
   dom.style.backgroundImage = 'url('+rollover.src+')';
  }
  function OnMouseOut(e) {
   image.src = src;
   dom.style.backgroundImage = '';
  }
 }
}