function getCookie (name ) {
	     var start = document.cookie.indexOf (name + "=" );
         var len = start + name.length + 1;
         if (( !start ) && (name != document.cookie.substring (0, name.length))) 
            return null;
         if ( start == -1) return null;
         var end = document.cookie.indexOf (';', len );
         if (end == -1) end = document.cookie.length;
         return unescape (document.cookie.substring (len, end));
         }
    function deleteCookie (name) {
          document.cookie = name+'=;expires=Thu, 01-Jan-1970 00:00:01 GMT';
          }