function showShot(file,title,w,h){
  var url = "file="+file + "&title="+title;
  ok=window.open("./screenshot.php?" + url,"","left=5,top=5,width="+w+",height="+h+
 		",menubar=no,directories=no,toolbar=no,location=no,status=no,"+
 		"scrollbars=no,resizable=no");
}