var TITEMS = [ 
 ["About Calendar", "c-about.html", "9"],
 ["Using the Calendar", "using.html", "2",
  ["Accessing Calendar", "c-accessing.html", "11"],
  ["Setting a New Event", "c-newevent.html", "11"],
  ["Accepting an RSVP", "c-acceptrsvp.html", "11"],
  ["Setting a Meeting", "c-meeting.html", "11"],
  ["Upcoming Events", "c-upcoming.html", "11"],
  ["Proxy", "c-proxy.html", "11"],
  ["Sync", "Sync.html", "11"],
  ["Event Planner", "c-planner.html", "11"]
 ],
 ["Administration of the Calendar", "admin.html", "2",
  ["Add a New Resource", "rs-newresource.html", "11"],
  ["Maintain a Resource", "rs-updateresource.html", "11"],
  ["Grant Access Priviledges", "rs-privileges.html", "11"],
  ["Publish Calendar", "c-publishcalendar.html", "11"],
  ["Import/Export Task XML", "c-taskxml.html", "11"]
 ],
 ["Tasks", "Tasks.html", "2",
  ["Accessing Tasks", "AccessTasks.html", "11"],
  ["Create a New Task", "CreateNewTask.html", "11"],
  ["Track Time", "TrackTime.html", "11"],
  ["Filter Tasks", "FilterTasks.html", "11"],
  ["Sync", "SyncTask.html", "11"]
 ]
];


function arr_flatten (x) {
   var y = []; if (x == null) return y;
   for (var i=0; i<x.length; i++) {
      if (typeof(x[i]) == "object") {
         var flat = arr_flatten(x[i]);
         for (var j=0; j<flat.length; j++)
             y[y.length]=flat[j];
      } else {
         if ((i%3==0) && (x[i+1] != null))
          y[y.length]=x[i+1];
      }
   }
   return y;
}

function arr_findNext (url, cnt)
{
   var y = arr_flatten(TITEMS);
   for (var i = 0; i<y.length; i++) {
     if (y[i] == url) {
       ni = i + cnt;
       if (ni < 0) ni = 0;
       if (ni > y.length-1) ni = y.length-1;

       return y[ni];
     }
   }
   return "";
}