var W3CDOM = (document.createElement && document.getElementsByTagName);

var mouseOvers = new Array();
var mouseOuts = new Array();

window.onload = init;

function init()
{
   if (!W3CDOM) return;
   var nav = document.getElementById('links');
   var imgs = nav.getElementsByTagName('img');
   for (var i=0;i<imgs.length;i++)
   {
      imgs[i].onmouseover = mouseGoesOver;
      imgs[i].onmouseout = mouseGoesOut;
      var suffix = imgs[i].src.substring(imgs[i].src.lastIndexOf('.'));
      mouseOuts[i] = new Image();
      mouseOuts[i].src = imgs[i].src;
      mouseOvers[i] = new Image();
      mouseOvers[i].src = imgs[i].src.substring(0,imgs[i].src.lastIndexOf('.')) + "-on" + suffix;
      imgs[i].number = i;
   }
}

function mouseGoesOver()
{
   this.src = mouseOvers[this.number].src;
}

function mouseGoesOut()
{
   this.src = mouseOuts[this.number].src;
}

function Scene(index)
{
	document.TWViewer.switchToScene(index);
}