function image (img,ref,w,h) {
   w = parseInt(w) + 37;
   h = parseInt(h) + 37;
   var winl = (screen.width - w) / 2;
   var wint = (screen.height - h) / 2;
   popup = window.open('image.php?img='+img+'&ref='+ref,'image','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,height='+h+',width='+w+', top='+wint+',left='+winl);
   popup.focus();
}

function preload() {
   if (document.getElementById) { // DOM3 = IE5, NS6
      document.getElementById('loader').style.visibility = 'hidden';
   } else {
      if (document.layers) { // Netscape 4
         document.loader.visibility = 'hidden';
      } else { // IE 4
         document.all.loader.style.visibility = 'hidden';
      }
   }
}