/** 

This code originally written by Peter-Paul Koch of Quirksmode fame.
Buy his book! http://www.quirksmode.org/book/

**/


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('mouseover');
  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('.')) + "_over" + suffix;
      imgs[i].number = i;
    }
}

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

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