var aryImages = new Array(4);


  aryImages[0] =  "Images/research/moss-expr-lg.jpg";
  
  aryImages[1] =  "Images/research/concept-300.jpg";

  aryImages[2] = "Images/research/line-light-shadow.jpg";
  
  aryImages[3] = "Images/research/ophiopogon-experi-lg.jpg";
  
  aryImages[4] =  "Images/research/saxifrage-experi-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];

  }