function set_cookie ( name, value, exp_y, exp_m, exp_d, path, domain, secure )
 {
   var cookie_string = name + "=" + escape ( value );

   if ( exp_y )
   {
     var expires = new Date ( exp_y, exp_m, exp_d );
     cookie_string += "; expires=" + expires.toGMTString();
   }

   if ( path )
         cookie_string += "; path=" + escape ( path );

   if ( domain )
         cookie_string += "; domain=" + escape ( domain );
   
   if ( secure )
         cookie_string += "; secure";
   
   document.cookie = cookie_string;
 }


 function get_cookie ( cookie_name )
 {
   var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' );

   if ( results )
     return ( unescape ( results[2] ) );
   else
     return null;
 }