var MouseOverImages = new Object();
window.addListener(MouseOverImages);
MouseOverImages.onload = function()
{
 for (var i = 0, ii = imgId.length; i < ii; i++)
 {
  var img = document.getElementById(imgId[i]);
  img.out = new Image;
  img.out.src = imgOutSrc[i];
  img.over = new Image;
  img.over.src = imgOverSrc[i];
  img.onmouseover = function()
  {
   this.src = this.over.src;
  }
  img.onmouseout = function()
  {
   this.src = this.out.src;
  }
 }
}