//Opens a popup window for displaying enlarged photos
function anewWindow(item){
   if (document.all(item).width < 120){
      strSize = "width=400,height=530";
      picwidth = "520";
   } else {
      strSize = "width=530,height=400";
      picwidth = "490";
   }

   itemWindow=window.open('http://www.australianaviationtraining.com/includes/bigpic.php?photo='+item+'&w='+picwidth,'itemwin',strSize);
   itemWindow.focus();
}