function update_stats()

{

  var body = document.getElementsByTagName('body')[0];

  body.style.cursor = 'wait';

  ajaxGet('ajax-active.php', function()

    {

      if ( window.ajax.readyState == 4 && window.ajax.status == 200 )

      {

        document.getElementById('active-members').innerHTML = ajax.responseText;

      }

    });

  var images = document.getElementsByTagName('img');

  for ( var i = 0; i < images.length; i++ )

  {

    var image = images[i];

    if ( image.className.indexOf('graph') != -1 )

    {

      image.src = (String(image.src)).replace(/&seed=[0-9]+$/, '') + '&seed=' + Math.floor(Math.random() * 100000);

    }

  }

  window.setTimeout(function()

    {

      body.style.cursor = null;

    }, 250);

}

window.onload = function()

{

  var ivl = parseFloat(readCookie('interval'));

  if ( ivl == 0 || isNaN(ivl) )

    ivl = 30.0;

  var textbox = document.getElementById('update_ivl');

  textbox.value = String(ivl);

  textbox.onkeyup = process_update_ivl;

  ivl = parseInt(ivl * 1000);

  window.ajax_update_ivl = window.setInterval('update_stats();', ivl);

}

function set_update_ivl(ivl)

{

  window.clearInterval(ajax_update_ivl);

  createCookie('interval', ivl, 3650);

  ivl = parseInt(ivl * 1000);

  window.ajax_update_ivl = window.setInterval('update_stats();', ivl);

}

function process_update_ivl()

{

  var val = parseFloat(this.value);

  if ( isNaN(val) || val < 5 )

    val = 10;

  set_update_ivl(val);

}

/**

 * Core AJAX library

 */

function ajaxMakeXHR()

{

  var ajax;

  if (window.XMLHttpRequest)

  {

    ajax = new XMLHttpRequest();

  }

  else

  {

    if (window.ActiveXObject)

    {           

      ajax = new ActiveXObject("Microsoft.XMLHTTP");

    }

    else

    {

      return false;

    }

  }

  return ajax;

}

function ajaxGet(uri, f, call_editor_safe) {

  window.ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    return false;

  }

  ajax.onreadystatechange = f;

  ajax.open('GET', uri, true);

  ajax.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );

  ajax.send(null);

}

function ajaxPost(uri, parms, f, call_editor_safe) {

  // Is the editor open?

  window.ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    return false;

  }

  ajax.onreadystatechange = f;

  ajax.open('POST', uri, true);

  ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

  // Setting Content-length in Safari triggers a warning

  if ( !is_Safari )

  {

    ajax.setRequestHeader("Content-length", parms.length);

  }

  ajax.setRequestHeader("Connection", "close");

  ajax.send(parms);

}

// Cookie manipulation

function readCookie(name) {var nameEQ = name + "=";var ca = document.cookie.split(';');for(var i=0;i < ca.length;i++){var c = ca[i];while (c.charAt(0)==' ') c = c.substring(1,c.length);if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);}return null;}

function createCookie(name,value,days){if (days){var date = new Date();date.setTime(date.getTime()+(days*24*60*60*1000));var expires = "; expires="+date.toGMTString();}else var expires = "";document.cookie = name+"="+value+expires+"; path=/";}

function eraseCookie(name) {createCookie(name,"",-1);}