function OpenUrlWindow(url, width, height)
{
  if (width<=0) width= 640;
  if (height<=0) height= 640;
  add_w = window.open(url,'wnd',
          'top='+(screen.height/2-height/2)+',left='+(screen.width/2-width/2)+
          ',resizable=no,menubar=no,scrollbars=no,status=no,width='+width+',height='+height+'');
  add_w.focus(); if (add_w.opener == null) { add_w.opener = window; }
  return false;
}

function ChangeImg(self_obj, place_name)
{
	obj_place= document.getElementById(place_name);
	obj_place.src= self_obj.src;
}