// Change the overlay on "montage" pics
      var altX = new Image();              // Create an Image object
      var altY = new Image();
      var altXX = new Image();
      var altYY = new Image();
      altX.src = "../images/clickX.gif";   // this loads it?
      altY.src = "../images/clickY.gif";
      altXX.src = "../images/clickXX.gif";
      altYY.src = "../images/clickYY.gif";

      function imgToClick(thePic,Horiz)
       {
         if (Horiz == true)
            thePic.src = altY.src;
         else
            thePic.src = altYY.src;
       }
      function imgToStay(thePic,Horiz)
       {
         if (Horiz == true)
            thePic.src = altX.src;
         else
            thePic.src = altXX.src;
       }