var ws=new Date();
  ws.setMinutes(1+ws.getMinutes());
  document.cookie="visitor=1; path=/; expires="+ ws.toGMTString();
  
  function get_cookie ( cookie_name )
{  var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );
   if ( results )
    return ( unescape ( results[2] ) );
  else
    return null; }