window.onunload = thank_on_exit;

var ntsite_live = true;
function thank_on_exit(){
  ntsite_live = false;
  if(typeof main_frame.countdown_win != "undefined" && !main_frame.countdown_win.closed)
     main_frame.countdown_win.close();
  if(typeof menu_frame.logout_on_exit != "undefined" && typeof menu_frame.top_loc != "undefined"){
     
     var url = menu_frame.logout_on_exit;
     //alert("thank you. " + url); 
     var w = 500;
     var h = 300;
     var sw = (screen.width-w)/2;
     var sh = (screen.height-h)/2 - 10;
     sw = sw > 0 ? sw : 200;
     sh = sh > 0 ? sh : 200;
     var lo_win = window.open("thankonexit.html", "lo_win", "top="+sh+",left="+sw+",width="+w+",height="+h+",menubar=no,scrollbars=no,resizable=no");
  }
}