theimg1 = new Image();
theimg1.src = "images/main_1.jpg";
theimg2 = new Image();
theimg2.src = "images/main_2.jpg";
theimg3 = new Image();
theimg3.src = "images/main_3.jpg";
theimg4 = new Image();
theimg4.src = "images/main_4.jpg";
theimg1o = new Image();
theimg1o.src = "images/main_1over.jpg";
theimg2o = new Image();
theimg2o.src = "images/main_2over.jpg";
theimg3o = new Image();
theimg3o.src = "images/main_3over.jpg";
theimg4o = new Image();
theimg4o.src = "images/main_4over.jpg";
counter=0;
overunder = true;

function changeImages()
{
  counter++;
  if(counter%4==1)
  {
    overunder = !overunder;
    document.images.img1.src = (overunder?theimg1.src:theimg1o.src);
  }
  if(counter%4==2) document.images.img2.src = (overunder?theimg2.src:theimg2o.src);
  if(counter%4==3) document.images.img3.src = (overunder?theimg3.src:theimg3o.src);
  if(counter%4==0) document.images.img4.src = (overunder?theimg4.src:theimg4o.src);
  window.setTimeout("changeImages()",3000)
}

var GalWindow;
function showPicture(href, width, height)
{
  if(GalWindow!=null) GalWindow.close();
  options = "height=" + (height+30) + ",width=" + (width+40) + ",toolbar=no,status=no,scrollbars=yes,resizable=no,location=no,menubar=no";
  GalWindow = window.open(href, "GalWindow", options);
  GalWindow.focus();
}