function BigImage(img,w,h)
{
  var obj_window = 
window.open(img,"","toolbar=no,directories=no,status = no,resizable=yes,menubar=no,scrollbars=auto,width="+w+", height="+h);
	obj_window.focus();
}

function changeTree(id)
{
   if( document.getElementById(id).style.visibility == 'hidden' )
   {
      document.getElementById(id).style.visibility = 'visible';
	  document.getElementById(id).style.display = 'inline';
   }
   else
   {
      document.getElementById(id).style.visibility = 'hidden';
	  document.getElementById(id).style.display = 'none';
   }
}