function ajaxToggleSystemThemes()

{

  var theme_list = document.getElementById('theme_list_edit');

  var mode = ( theme_list.sys_shown ) ? 'hide' : 'show';

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

  {

    var child = theme_list.childNodes[i];

    if ( child.tagName == 'DIV' )

    {

      if ( $(child).hasClass('themebutton_theme_system') )

      {

        if ( $(child).hasClass('themebutton_theme_disabled') )

        {

          $(child).rmClass('themebutton_theme_disabled')

        }

        if ( mode == 'show' )

        {

          domObjChangeOpac(0, child);

          child.style.display = 'block';

          domOpacity(child, 0, 100, 1000);

        }

        else

        {

          domOpacity(child, 100, 0, 1000);

          setTimeout("document.getElementById('" + child.id + "').style.display = 'none';", 1050);

        }

      }

    }

  }

  theme_list.sys_shown = ( mode == 'show' );

  document.getElementById('systheme_toggler').innerHTML = ( mode == 'hide' ) ? $lang.get('acptm_btn_system_themes_show') : $lang.get('acptm_btn_system_themes_hide');

}

function ajaxInstallTheme(theme_id)

{

  var thediv = document.getElementById('themebtn_install_' + theme_id);

  if ( !thediv )

    return false;

  thediv.removeChild(thediv.getElementsByTagName('a')[0]);

  var status = document.createElement('div');

  status.className = 'status';

  thediv.appendChild(status);

  var req = toJSONString({

      mode: 'install',

      theme_id: theme_id

    });

  // we've finished nukeing the existing interface, request editor data

  ajaxPost(makeUrlNS('Admin', 'ThemeManager/action.json'), 'r=' + ajaxEscape(req), function()

    {

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

      {

        var response = String(ajax.responseText + '');

        if ( response.substr(0, 1) == '{' )

        {

          response = parseJSON(response);

          if ( response.mode == 'error' )

          {

            alert(response.error);

            return false;

          }

        }

        var theme_list = document.getElementById('theme_list_edit');

        var btn = document.createElement('div');

        btn.className = 'themebutton';

        btn.style.backgroundImage = thediv.style.backgroundImage;

        btn.id = 'themebtn_edit_' + theme_id;

        var a = document.createElement('a');

        a.className = 'tb-inner';

        a.appendChild(document.createTextNode($lang.get('acptm_btn_theme_edit')));

        a.appendChild(document.createTextNode("\n"));

        a.theme_id = theme_id;

        a.onclick = function()

        {

          ajaxEditTheme(this.theme_id);

          return false;

        }

        a.href = '#';

        var span = document.createElement('span');

        span.className = 'themename';

        span.appendChild(document.createTextNode(thediv.getAttribute('enano:themename')));

        a.appendChild(span);

        btn.appendChild(a);

        btn.setAttribute('enano:themename', thediv.getAttribute('enano:themename'));

        theme_list.appendChild(btn);

        thediv.parentNode.removeChild(thediv);

      }

    });

}

function ajaxEditTheme(theme_id)

{

  // Fade out and subsequently destroy the entire list, then make an

  // ajax request to the theme manager for the theme info via JSON

  var theme_list = document.getElementById('theme_list_edit').parentNode;

  var backgroundImage = document.getElementById('themebtn_edit_' + theme_id).style.backgroundImage;

  /*

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

  {

    var el = theme_list.childNodes[i];

    if ( el.tagName )

      domOpacity(el, 100, 0, 1000);

  }

  */

  var thediv = document.getElementById('themebtn_edit_' + theme_id);

  if ( !thediv )

    return false;

  thediv.removeChild(thediv.getElementsByTagName('a')[0]);

  var status = document.createElement('div');

  status.className = 'status';

  thediv.appendChild(status);

  setTimeout(function()

    {

      var req = toJSONString({

          mode: 'fetch_theme',

          theme_id: theme_id

        });

      // we've finished nukeing the existing interface, request editor data

      ajaxPost(makeUrlNS('Admin', 'ThemeManager/action.json'), 'r=' + ajaxEscape(req), function()

        {

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

          {

            theme_list.innerHTML = '';

            var response = String(ajax.responseText + '');

            if ( response.substr(0, 1) != '{' )

            {

              alert(response);

              return false;

            }

            response = parseJSON(response);

            if ( response.mode == 'error' )

            {

              alert(response.error);

              return false;

            }

            response.background_image = backgroundImage;

            ajaxBuildThemeEditor(response, theme_list);

          }

        });

    }, 200);

}

function ajaxBuildThemeEditor(data, target)

{

  // Build the theme editor interface

  // Init opacity

  domObjChangeOpac(0, target);

  // Theme preview

  var preview = document.createElement('div');

  preview.style.border = '1px solid #F0F0F0';

  preview.style.padding = '5px';

  preview.style.width = '216px';

  preview.style.height = '150px';

  preview.style.backgroundImage = data.background_image;

  preview.style.backgroundRepeat = 'no-repeat';

  preview.style.backgroundPosition = 'center center';

  preview.style.cssFloat = 'right';

  preview.style.styleFloat = 'right';

  target.appendChild(preview);

  // Heading

  var h3 = document.createElement('h3');

  h3.appendChild(document.createTextNode($lang.get('acptm_heading_theme_edit', { theme_name: data.theme_name })));

  target.appendChild(h3);

  // Field: Theme name

  var l_name = document.createElement('label');

  l_name.appendChild(document.createTextNode($lang.get('acptm_field_theme_name') + ' '));

  var f_name = document.createElement('input');

  f_name.type = 'text';

  f_name.id = 'themeed_field_name';

  f_name.value = data.theme_name;

  f_name.size = '40';

  l_name.appendChild(f_name);

  target.appendChild(l_name);

  target.appendChild(document.createElement('br'));

  target.appendChild(document.createElement('br'));

  // Field: default style

  var l_style = document.createElement('label');

  l_style.appendChild(document.createTextNode($lang.get('acptm_field_default_style') + ' '));

  var f_style = document.createElement('select');

  f_style.id = 'themeed_field_style';

  var opts = [];

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

  {

    if ( data.css[i] == '_printable' )

      continue;

    opts[i] = document.createElement('option');

    opts[i].value = data.css[i];

    opts[i].appendChild(document.createTextNode(data.css[i]));

    if ( data.default_style == data.css[i] )

    {

      opts[i].selected = true;

    }

    f_style.appendChild(opts[i]);

  }

  l_style.appendChild(f_style);

  target.appendChild(l_style);

  target.appendChild(document.createElement('br'));

  target.appendChild(document.createElement('br'));

  // Default theme

  target.appendChild(document.createTextNode($lang.get('acptm_field_default_theme') + ' '));

  if ( data.is_default )

  {

    var l_default = document.createElement('b');

    l_default.appendChild(document.createTextNode($lang.get('acptm_field_default_msg_current')));

  }

  else

  {

    var l_default = document.createElement('label');

    var f_default = document.createElement('input');

    f_default.type = 'checkbox';

    f_default.id = 'themeed_field_default';

    l_default.appendChild(f_default);

    l_default.appendChild(document.createTextNode($lang.get('acptm_field_default_btn_make_default')));

  }

  target.appendChild(l_default);

  target.appendChild(document.createElement('br'));

  target.appendChild(document.createElement('br'));

  // Disable theme

  var disable_span = document.createElement('span');

  disable_span.appendChild(document.createTextNode($lang.get('acptm_field_disable_title') + ' '));

  target.appendChild(disable_span);

  var l_disable = document.createElement('label');

  var f_disable = document.createElement('input');

  f_disable.type = 'checkbox';

  f_disable.id = 'themeed_field_disable';

  if ( !data.enabled )

    f_disable.setAttribute('checked', 'checked');

  l_disable.style.fontWeight = 'bold';

  l_disable.appendChild(f_disable);

  l_disable.appendChild(document.createTextNode($lang.get('acptm_field_disable')));

  target.appendChild(l_disable);

  // Availability policy

  var h3 = document.createElement('h3');

  h3.appendChild(document.createTextNode($lang.get('acptm_heading_theme_groups')));

  target.appendChild(h3);

  // Label for the whole field

  var p_d_policy = document.createElement('p');

  p_d_policy.style.fontWeight = 'bold';

  p_d_policy.appendChild(document.createTextNode($lang.get('acptm_field_policy')));

  target.appendChild(p_d_policy);

  // Wrapper for options

  var p_f_policy = document.createElement('p');

  // Option: allow all

  var l_policy_allow_all = document.createElement('label');

  var f_policy_allow_all = document.createElement('input');

  f_policy_allow_all.type = 'radio';

  f_policy_allow_all.id = 'themeed_field_policy_allow_all';

  f_policy_allow_all.name = 'themeed_field_policy';

  f_policy_allow_all.value = 'allow_all';

  l_policy_allow_all.appendChild(f_policy_allow_all);

  l_policy_allow_all.appendChild(document.createTextNode(' ' + $lang.get('acptm_field_policy_allow_all')));

  if ( data.group_policy == 'allow_all' )

  {

    f_policy_allow_all.setAttribute('checked', 'checked');

  }

  // Option: whitelist

  var l_policy_whitelist = document.createElement('label');

  var f_policy_whitelist = document.createElement('input');

  f_policy_whitelist.type = 'radio';

  f_policy_whitelist.id = 'themeed_field_policy_whitelist';

  f_policy_whitelist.name = 'themeed_field_policy';

  f_policy_whitelist.value = 'whitelist';

  l_policy_whitelist.appendChild(f_policy_whitelist);

  l_policy_whitelist.appendChild(document.createTextNode(' ' + $lang.get('acptm_field_policy_whitelist')));

  if ( data.group_policy == 'whitelist' )

  {

    f_policy_whitelist.setAttribute('checked', 'checked');

  }

  // Option: blacklist

  var l_policy_blacklist = document.createElement('label');

  var f_policy_blacklist = document.createElement('input');

  f_policy_blacklist.type = 'radio';

  f_policy_blacklist.id = 'themeed_field_policy_blacklist';

  f_policy_blacklist.name = 'themeed_field_policy';

  f_policy_blacklist.value = 'blacklist';

  l_policy_blacklist.appendChild(f_policy_blacklist);

  l_policy_blacklist.appendChild(document.createTextNode(' ' + $lang.get('acptm_field_policy_blacklist')));

  if ( data.group_policy == 'blacklist' )

  {

    f_policy_blacklist.setAttribute('checked', 'checked');

  }

  f_policy_allow_all.onclick = ajaxThemeManagerHandlePolicyClick;

  f_policy_whitelist.onclick = ajaxThemeManagerHandlePolicyClick;

  f_policy_blacklist.onclick = ajaxThemeManagerHandlePolicyClick;

  p_f_policy.appendChild(l_policy_allow_all);

  p_f_policy.appendChild(document.createElement('br'));

  p_f_policy.appendChild(l_policy_whitelist);

  p_f_policy.appendChild(document.createElement('br'));

  p_f_policy.appendChild(l_policy_blacklist);

  target.appendChild(p_d_policy);

  target.appendChild(p_f_policy);

  var div_acl = document.createElement('div');

  div_acl.id = 'themeed_acl_box';

  div_acl.style.margin = '0 0 10px 30px';

  var h3_g = document.createElement('h3');

  h3_g.appendChild(document.createTextNode($lang.get('acptm_field_acl_heading_groups')));

  div_acl.appendChild(h3_g);

  var div_groups = document.createElement('div');

  div_groups.style.border = '1px solid #E8E8E8';

  div_groups.id = 'themeed_group_list';

  // Group list

  for ( var i in data.group_names )

  {

    var g_name = data.group_names[i];

    var check = document.createElement('input');

    check.type = 'checkbox';

    if ( in_array("g:" + i, data.group_list) )

    {

      check.setAttribute('checked', 'checked');

    }

    check.group_id = parseInt(i);

    var lbl_g_acl = document.createElement('label');

    lbl_g_acl.appendChild(check);

    // FIXME: l10n on group name

    lbl_g_acl.appendChild(document.createTextNode(g_name));

    div_groups.appendChild(lbl_g_acl);

    div_groups.appendChild(document.createElement('br'));

  }

  div_acl.appendChild(div_groups);

  var h3_u = document.createElement('h3');

  h3_u.appendChild(document.createTextNode($lang.get('acptm_field_acl_heading_users')));

  div_acl.appendChild(h3_u);

  // User addition field

  var frm = document.createElement('form');

  frm.action = 'javascript:ajaxThemeManagerHandleUserAdd();';

  frm.appendChild(document.createTextNode($lang.get('acptm_field_acl_add_user')));

  var f_useradd = document.createElement('input');

  f_useradd.type = 'text';

  f_useradd.id = 'themeed_field_adduser';

  f_useradd.onkeyup = function(e)

  {

    new AutofillUsername(this, e, false);

  }

  frm.appendChild(f_useradd);

  div_acl.appendChild(frm);

  div_acl.appendChild(document.createElement('br'));

  // User list

  var div_users = document.createElement('div');

  div_users.style.border = '1px solid #E8E8E8';

  div_users.style.padding = '4px';

  div_users.id = 'themeed_user_list';

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

  {

    var id = data.group_list[i];

    if ( id.substr(0, 2) != 'u:' )

      continue;

    var uid = id.substr(2);

    var username = data.usernames[uid];

    var useritem = document.createElement('span');

    useritem.appendChild(document.createTextNode(username + ' '));

    useritem.userid = parseInt(uid);

    var deleter = document.createElement('a');

    deleter.href = '#';

    deleter.onclick = function()

    {

      ajaxThemeManagerHandleUserRemoval(this);

      return false;

    }

    deleter.appendChild(document.createTextNode('[X]'));

    useritem.appendChild(deleter);

    div_users.appendChild(useritem);

    div_users.appendChild(document.createElement('br'));

  }

  div_acl.appendChild(div_users);

  target.appendChild(div_acl);

  ajaxThemeManagerHandlePolicyClick();

  var clearer = document.createElement('span');

  clearer.className = 'menuclear';

  target.appendChild(clearer);

  // Theme ID

  var tid = document.createElement('input');

  tid.type = 'hidden';

  tid.id = 'themeed_theme_id';

  tid.value = data.theme_id;

  target.appendChild(tid);

  // Save button

  var raquo = unescape('%BB');

  var savebtn = document.createElement('input');

  savebtn.type = 'button';

  savebtn.style.fontWeight = 'bold';

  savebtn.value = $lang.get('etc_save_changes') + ' ' + raquo;

  savebtn.onclick = function()

  {

    ajaxThemeManagerHandleSaveRequest();

  }

  target.appendChild(savebtn);

  target.appendChild(document.createTextNode(' '));

  // Cancel button

  var savebtn = document.createElement('input');

  savebtn.type = 'button';

  savebtn.value = $lang.get('etc_cancel');

  savebtn.onclick = function()

  {

    ajaxPage(namespace_list['Admin'] + 'ThemeManager');

  }

  target.appendChild(savebtn);

  target.appendChild(document.createTextNode(' '));

  // Uninstall button

  var savebtn = document.createElement('input');

  savebtn.type = 'button';

  savebtn.value = $lang.get('acptm_btn_uninstall_theme');

  savebtn.style.color = '#D84308';

  savebtn.onclick = function()

  {

    if ( !confirm($lang.get('acptm_msg_uninstall_confirm')) )

      return false;

    ajaxThemeManagerHandleUninstallClick();

  }

  target.appendChild(savebtn);

  // Fade it all in

  domOpacity(target, 0, 100, 500);

  f_name.focus();

}

function ajaxThemeManagerHandlePolicyClick()

{

  if ( document.getElementById('themeed_field_policy_allow_all').checked )

  {

    document.getElementById('themeed_acl_box').style.display = 'none';

  }

  else if ( document.getElementById('themeed_field_policy_whitelist').checked || document.getElementById('themeed_field_policy_blacklist').checked )

  {

    document.getElementById('themeed_acl_box').style.display = 'block';

  }

}

function ajaxThemeManagerHandleUserAdd()

{

  var f_useradd = document.getElementById('themeed_field_adduser');

  f_useradd.setAttribute('disabled', 'disabled');

  var parent = f_useradd.parentNode;

  var img = document.createElement('img');

  img.src = ajax_load_icon;

  img.id = 'themeed_useradd_status';

  img.style.marginLeft = '10px';

  insertAfter(parent, img, f_useradd);

  var req = toJSONString({

      mode: 'uid_lookup',

      username: f_useradd.value

    });

  ajaxPost(makeUrlNS('Admin', 'ThemeManager/action.json'), 'r=' + ajaxEscape(req), function()

    {

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

      {

        var img = document.getElementById('themeed_useradd_status');

        var f_useradd = document.getElementById('themeed_field_adduser');

        f_useradd.disabled = null;

        img.parentNode.removeChild(img);

        // process response

        var response = String(ajax.responseText + '');

        if ( response.substr(0, 1) != '{' )

        {

          alert(response);

          return false;

        }

        response = parseJSON(response);

        if ( response.mode == 'error' )

        {