function SetCookie(sName, sValue, bSessionState)
      {
        date = new Date();
        if(bSessionState)
        {
            document.cookie = sName + '=' + escape(sValue);
        }
        else
        {
            document.cookie = sName + '=' + escape(sValue) + '; expires=Fri, 31 Dec 2020 23:59:59 GMT;';
        }
      }

      function GetCookie(sName)
      {
          // cookies are separated by semicolons
          var aCookie = document.cookie.split('; ');
          for (var i=0; i < aCookie.length; i++)
          {
            // a name/value pair (a crumb) is separated by an equal sign
            var aCrumb = aCookie[i].split('=');
            if (sName == aCrumb[0]) 
              return unescape(aCrumb[1]);
          }

          // a cookie with the requested name does not exist
          return null;
      }

      function DelCookie(sName)
      {
        document.cookie = sName + '=' + escape('deleted') + '; expires=Fri, 31 Dec 1999 23:59:59 GMT;';
      }