/* Swap Image Nav */
  var aryImages = new Array(2);

  aryImages[0] = "images/autodesk_1_lg.jpg";
  aryImages[1] = "images/autodesk_2_lg.jpg";
  aryImages[2] = "images/autodesk_3_lg.jpg";

  for (i=0; i < aryImages.length; i++) {
    var preload = new Image();
    preload.src = aryImages[i];
  }

  function swap(imgIndex) {
    document['imgMain'].src = aryImages[imgIndex];
  }