var rollbacklink = 'rollback';

var cantrollback = 'Cannot revert edit; last contributor is only author of this page.';

var alreadyrolled = 'Cannot rollback last edit of [[$1]] by [[User:$2|$2]] ([[User talk:$2|Talk]]); someone else has edited or rolled back the page already. Last edit was by [[User:$3|$3]] ([[User talk:$3|Talk]]). ';

var revertpage = 'Reverted edits by [[Special:Contributions/$2|$2]] to last version by $1';

switch (document.getElementsByTagName('html')[0].lang) {

  case 'fr':

    rollbacklink = 'révoquer';

    cantrollback = 'Impossible de révoquer: dernier auteur est le seul à avoir modifié cet article';

    alreadyrolled = 'Impossible de révoquer la dernière modification de [[$1]] par  [[User:$2|$2]] ([[User talk:$2|Talk]]); quelqu\'un d\'autre à déjà modifer ou révoquer l\'article. La dernière modificaion était de [[User:$3|$3]] ([[User talk:$3|Talk]]). '; // lol @ pathetic grammar

    revertpage = "Révocation des modifications de [[Special:Contributions/$2|$2]] et restauration d'une précédente version de $1";

    break;

  case 'de':

    rollbacklink = 'Zurücksetzen';

    cantrollback = 'Die Änderung kann nicht zurückgenommen werden; der letzte Autor ist der einzige.';

    alreadyrolled = 'Die Zurücknahme des Artikels [[$1]] von [[Benutzer:$2|$2]] ([[Benutzer Diskussion:$2|Diskussion]]) ist nicht möglich, da eine andere Änderung oder Rücknahme erfolgt ist.  Die letzte Änderung ist von [[Benutzer:$3|$3]] ([[Benutzer Diskussion:$3|Diskussion]])';

    revertpage = 'Änderungen von [[Benutzer:$2]] rückgängig gemacht und letzte Version von [[Benutzer:$1]] wiederhergestellt';

    break;

  case 'es':

    rollbacklink = 'Revertir';

    cantrollback = 'No se pueden revertir las ediciones; el último colaborador es el único autor de este artículo.';

    alreadyrolled = 'No se puede revertir la última edición de [[$1]] por [[Colaborador:$2|$2]] ([[Colaborador Discusión:$2|Discusión]]); alguien más ya ha editado o revertido esa página.  La última edición fue hecha por [[Colaborador:$3|$3]] ([[Colaborador Discusión:$3|Discusión]]). ';

    revertpage = 'Revertida a la última edición de $1';

    break;

  case 'it':

    rollbacklink = 'rollback';

    cantrollback = 'Impossibile tornare ad una versione precedente: l\'ultima modifica è stata apportata dall\'unico utente che abbia lavorato a questo articolo.';

    //alreadyrolled = '';

    revertpage = 'Riportata alla revisione precedente da $1';

    break;

  case 'pt':

    rollbacklink = 'voltar';

    cantrollback = 'Não foi possível reverter a edição; o último contribuidor é o único autor deste artigo.';

    alreadyrolled = 'Não foi possível reverter as edições de  [[$1]] por [[User:$2|$2]] ([[User talk:$2|Talk]]); alguém o editou ou já o reverteu.  A última edição foi de  [[User:$3|$3]] ([[User talk:$3|Conversar com ele]]). ';

    revertpage = 'Revertidas edições por [[Special:Contributions/$2|$2]], para a última versão por $1';

    break;

}



// -----------------------------------------------------------------------------

// XMLHttpRequest support

// -----------------------------------------------------------------------------

if (document.implementation.createDocument) {

  var xmlparser = new DOMParser();

}



function XMLParse(string) {

  if (document.implementation.createDocument) {

    return xmlparser.parseFromString(string, "text/xml");

  } else if (window.ActiveXObject) {

    var xmldoc = new ActiveXObject("Microsoft.XMLDOM");

    xmldoc.async = "false";

    ret = xmldoc.loadXML(string);      

    if (!ret)

      return null;

    return xmldoc.documentElement;

  }

  return null;

}



var xmlhttp;



function HTTPClient() {

  var http;

  if(window.XMLHttpRequest) {

    http = new XMLHttpRequest();

  } else if (window.ActiveXObject) {

    try {

      http = new ActiveXObject("Msxml2.XMLHTTP");

    } catch (e) {

      try {

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

      } catch (E) {

        http = false;

      }

    }

  }

  return http;

}



// -----------------------------------------------------------------------------

// MD5 hash calculator

// -----------------------------------------------------------------------------

// Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.

// Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet

// Distributed under the BSD License

// See http://pajhome.org.uk/crypt/md5 for more info.

// -----------------------------------------------------------------------------

var hexcase = 0;

var b64pad  = "";

var chrsz   = 8;



function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}



function core_md5(x, len)

{

  xlen >> 5 |= 0x80 << ((len) % 32);

  x[(((len + 64) >>> 9) << 4) + 14 = len;



  var a =  1732584193;

  var b = -271733879;

  var c = -1732584194;

  var d =  271733878;



  for(var i = 0; i < x.length; i += 16)

  {

    var olda = a;

    var oldb = b;

    var oldc = c;

    var oldd = d;



    a = md5_ff(a, b, c, d, xi+ 0], 7 , -680876936); d = md5_ff(d, a, b, c, xi+ 1], 12, -389564586); c = md5_ff(c, d, a, b, xi+ 2], 17,  606105819); b = md5_ff(b, c, d, a, xi+ 3], 22, -1044525330); a = md5_ff(a, b, c, d, xi+ 4], 7 , -176418897); d = md5_ff(d, a, b, c, xi+ 5], 12,  1200080426); c = md5_ff(c, d, a, b, xi+ 6], 17, -1473231341); b = md5_ff(b, c, d, a, xi+ 7], 22, -45705983); a = md5_ff(a, b, c, d, xi+ 8], 7 ,  1770035416); d = md5_ff(d, a, b, c, xi+ 9], 12, -1958414417); c = md5_ff(c, d, a, b, xi+10], 17, -42063); b = md5_ff(b, c, d, a, xi+11], 22, -1990404162); a = md5_ff(a, b, c, d, xi+12], 7 ,  1804603682); d = md5_ff(d, a, b, c, xi+13], 12, -40341101); c = md5_ff(c, d, a, b, xi+14], 17, -1502002290); b = md5_ff(b, c, d, a, xi+15], 22,  1236535329);



    a = md5_gg(a, b, c, d, xi+ 1], 5 , -165796510); d = md5_gg(d, a, b, c, xi+ 6], 9 , -1069501632); c = md5_gg(c, d, a, b, xi+11], 14,  643717713); b = md5_gg(b, c, d, a, xi+ 0], 20, -373897302); a = md5_gg(a, b, c, d, xi+ 5], 5 , -701558691); d = md5_gg(d, a, b, c, xi+10], 9 ,  38016083); c = md5_gg(c, d, a, b, xi+15], 14, -660478335); b = md5_gg(b, c, d, a, xi+ 4], 20, -405537848); a = md5_gg(a, b, c, d, xi+ 9], 5 ,  568446438); d = md5_gg(d, a, b, c, xi+14], 9 , -1019803690); c = md5_gg(c, d, a, b, xi+ 3], 14, -187363961); b = md5_gg(b, c, d, a, xi+ 8], 20,  1163531501); a = md5_gg(a, b, c, d, xi+13], 5 , -1444681467); d = md5_gg(d, a, b, c, xi+ 2], 9 , -51403784); c = md5_gg(c, d, a, b, xi+ 7], 14,  1735328473); b = md5_gg(b, c, d, a, xi+12], 20, -1926607734);



    a = md5_hh(a, b, c, d, xi+ 5], 4 , -378558); d = md5_hh(d, a, b, c, xi+ 8], 11, -2022574463); c = md5_hh(c, d, a, b, xi+11], 16,  1839030562); b = md5_hh(b, c, d, a, xi+14], 23, -35309556); a = md5_hh(a, b, c, d, xi+ 1], 4 , -1530992060); d = md5_hh(d, a, b, c, xi+ 4], 11,  1272893353); c = md5_hh(c, d, a, b, xi+ 7], 16, -155497632); b = md5_hh(b, c, d, a, xi+10], 23, -1094730640); a = md5_hh(a, b, c, d, xi+13], 4 ,  681279174); d = md5_hh(d, a, b, c, xi+ 0], 11, -358537222); c = md5_hh(c, d, a, b, xi+ 3], 16, -722521979); b = md5_hh(b, c, d, a, xi+ 6], 23,  76029189); a = md5_hh(a, b, c, d, xi+ 9], 4 , -640364487); d = md5_hh(d, a, b, c, xi+12], 11, -421815835); c = md5_hh(c, d, a, b, xi+15], 16,  530742520); b = md5_hh(b, c, d, a, xi+ 2], 23, -995338651);



    a = md5_ii(a, b, c, d, xi+ 0], 6 , -198630844); d = md5_ii(d, a, b, c, xi+ 7], 10,  1126891415); c = md5_ii(c, d, a, b, xi+14], 15, -1416354905); b = md5_ii(b, c, d, a, xi+ 5], 21, -57434055); a = md5_ii(a, b, c, d, xi+12], 6 ,  1700485571); d = md5_ii(d, a, b, c, xi+ 3], 10, -1894986606); c = md5_ii(c, d, a, b, xi+10], 15, -1051523); b = md5_ii(b, c, d, a, xi+ 1], 21, -2054922799); a = md5_ii(a, b, c, d, xi+ 8], 6 ,  1873313359); d = md5_ii(d, a, b, c, xi+15], 10, -30611744); c = md5_ii(c, d, a, b, xi+ 6], 15, -1560198380); b = md5_ii(b, c, d, a, xi+13], 21,  1309151649); a = md5_ii(a, b, c, d, xi+ 4], 6 , -145523070); d = md5_ii(d, a, b, c, xi+11], 10, -1120210379); c = md5_ii(c, d, a, b, xi+ 2], 15,  718787259); b = md5_ii(b, c, d, a, xi+ 9], 21, -343485551);



    a = safe_add(a, olda);

    b = safe_add(b, oldb);

    c = safe_add(c, oldc);

    d = safe_add(d, oldd);

  }

  return Array(a, b, c, d);



}



function md5_cmn(q, a, b, x, s, t) { return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b); }

function md5_ff(a, b, c, d, x, s, t) { return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t); }

function md5_gg(a, b, c, d, x, s, t) { return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t); }

function md5_hh(a, b, c, d, x, s, t) { return md5_cmn(b ^ c ^ d, a, b, x, s, t); }

function md5_ii(a, b, c, d, x, s, t) { return md5_cmn(c ^ (b | (~d)), a, b, x, s, t); }



function safe_add(x, y)

{

  var lsw = (x & 0xFFFF) + (y & 0xFFFF);

  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);

  return (msw << 16) | (lsw & 0xFFFF);

}



function bit_rol(num, cnt)

{

  return (num << cnt) | (num >>> (32 - cnt));

}



function str2binl(str)

{

  var bin = Array();

  var mask = (1 << chrsz) - 1;

  for(var i = 0; i < str.length * chrsz; i += chrsz)

    bini>>5 |= (str.charCodeAt(i / chrsz) & mask) << (i%32);

  return bin;

}



function binl2hex(binarray)

{

  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";

  var str = "";

  for(var i = 0; i < binarray.length * 4; i++)

  {

    str += hex_tab.charAt((binarrayi>>2 >> ((i%4)*8+4)) & 0xF) +

           hex_tab.charAt((binarrayi>>2 >> ((i%4)*8  )) & 0xF);

  }

  return str;

}



// -----------------------------------------------------------------------------

// Our nice Revert functions

// -----------------------------------------------------------------------------

var gml_vandal, gml_editor, gml_url;



function PerformRevert() {

  var l, token = '', revert = false;

  // Look for '&fakeaction=rollback' in URL

  gml_url = location.pathname;

  l = location.search.substring(1).split('&');

  for (i = 0; i < l.length; i++) {

    var n = li].indexOf('=');

    var name = li].substring(0, n);

    if (name == 'fakeaction') {

      if (li].substring(n + 1) == 'rollback')

        revert = true;

    } else if (name == 'vandal') {

      gml_vandal = unescape(li].substring(n + 1));

    } else if (name == 'token') {

      token = unescape(li].substring(n + 1));

    } else if (name == 'title') {

      gml_url += '?' + li];

    }

  }

  if (!revert)

    return;

  document.getElementById('bodyContent').innerHTML = 'Please wait, reverting edits by ' + gml_vandal + '...';

  // Avoid XSS kiddies by using a special token

  if (token == '' || token != hex_md5(gml_url + gml_vandal + document.cookie)) {

    document.getElementById('bodyContent').innerHTML += '<br />Bad authentication token!';

    return;

  }



  xmlhttp = HTTPClient();

  if (!xmlhttp)

    return;

  document.getElementById('bodyContent').innerHTML += '<br />Getting article history...';

  xmlhttp.open("GET", gml_url + '&action=history&limit=50', true);

  xmlhttp.onreadystatechange = RevertStepTwo;

  xmlhttp.send(null);

}



function RevertStepTwo() {

  if (xmlhttp.readyState != 4)

    return

  var l;

  var oldid;

  // Get the vandal and new editor names

  gml_editor = '';

  doc = XMLParse(xmlhttp.responseText);

  l = doc.getElementById('pagehistory').getElementsByTagName('li');

  //l = doc.selectSingleNode('//*[@id="pagehistory"]').getElementsByTagName('li');

  for (i = 0; i < l.length; i++) {

    var name = li].getElementsByTagName('span')[0].getElementsByTagName('a')[0].innerHTML;

    if (i == 0 && name != gml_vandal) {

      document.getElementById('bodyContent').innerHTML += '<br />Error: ' + gml_vandal + ' is not the last editor!';

      return;

    } else if (i > 0 && name != gml_vandal) {

      oldid = li].getElementsByTagName('input')[0].value;

      gml_editor = name;

      break;

    }

  }

  if (gml_editor == '') {

    document.getElementById('bodyContent').innerHTML += '<br />Error: ' + gml_vandal + ' is the only editor!';

    return;

  }



  xmlhttp = HTTPClient();

  if (!xmlhttp)

    return;

  document.getElementById('bodyContent').innerHTML += '<br />Getting article edit form (GET' + gml_url + '&action=edit&oldid=' + oldid + ')...';

  xmlhttp.open('GET', gml_url + '&action=edit&oldid=' + oldid, true);

  xmlhttp.onreadystatechange = RevertStepThree;

  xmlhttp.send(null);

}



function RevertStepThree() {

  if (xmlhttp.readyState != 4)

    return

  var form, newform, l;

  // Insert the downloaded form in our current page, using

  // only hidden form inputs.

  doc = XMLParse(xmlhttp.responseText);

  form = doc.getElementById('editform');

  newform = document.createElement('form');

  l = form.getElementsByTagName('textarea');

  for (i = l.length; i--; ) {

    var t = document.createElement('input');

    t.type = 'hidden';

    t.name = li].name;

    t.value = li].innerHTML;

    newform.appendChild(t);

  }

  l = form.getElementsByTagName('input');

  for (i = l.length; i--; ) {

    if (li].name == 'wpSummary') {

      li].value = revertpage.replace(/\$1/g, gml_editor).replace(/\$2/g, gml_vandal);

    } else if (li].name == 'wpMinoredit') {

      li].value = '1';

    } else if (li].name == 'wpWatchthis') {

      if (!li].checked)

        continue; // Don’t touch the "watch" status

      li].value = "on";

    } else if (li].name == 'wpPreview') {

      continue;

    } else if (li].name == 'wpDiff') {

      continue;

    }

    li].type = 'hidden';

    newform.appendChild(li]);

  }

  newform.name = form.name;

  newform.method = form.method;

  newform.id = form.id;

  newform.action = form.action;

  document.getElementById('bodyContent').innerHTML += '<br />Submitting form...';

  document.getElementById('bodyContent').appendChild(newform);

  // Submit the form

  newform.submit();

}



// -----------------------------------------------------------------------------

// Add revert buttons to the page

// -----------------------------------------------------------------------------

function AddRevertButtons() {

  var l, article = '', vandal;

  // Add 'revert' links to a diff page

  l = document.getElementById('bodyContent').getElementsByTagName('td');

  for (i = 0; i < l.length; i++) {

    if (li].className == 'diff-otitle') {

      article = li].getElementsByTagName('a')[0].href.split('&')[0].replace(/[^\/]*\/\/[^\/]*/, '');

    } else if (li].className == 'diff-ntitle') {

      var toplink = li].getElementsByTagName('a')[0].href;

      vandal = li].getElementsByTagName('a')[1].title.split(':')[1];

      var t = li].innerHTML

      n = t.indexOf('</a>) <br') + t.indexOf('</A>) <BR') + 1; // XXX: WOW HACK!!!!

      if (n >= 0 && article != '' && toplink.indexOf('oldid=') == -1) {

        li].innerHTML = t.substring(0, n + 5) + ' &nbsp;&nbsp;&nbsp;<strong>[<a href="' + article + '&fakeaction=rollback&vandal=' + vandal + '&token=' + hex_md5(article + vandal + document.cookie) + '">' + rollbacklink + '</a>]</strong> ' + t.substring(n + 5, t.length);

      }

    }

  }

  // Add 'revert' links to a contributions page

  if (location.href.indexOf(':Contributions') != -1) {

    var c = document.getElementById('contentSub');

    var a = c.getElementsByTagName('a');

    if (a.length == 2) {

      vandal = a0].innerHTML;

    } else {

      vandal = c.innerHTML.replace(/ \(.*/, '').replace(/.* /, '');

    }

    l = document.getElementById('bodyContent').getElementsByTagName('li');

    for (i = 0; i < l.length; i++) {

      var t = li].innerHTML

      // If we are already a sysop on this wiki, abort

      if (t.indexOf('>' + rollbacklink + '</a>]') != -1)

          break;

      //if (t.indexOf('&amp;diff=0') != -1) {

      if (t.indexOf('<strong> (') != -1) {

        article = li].getElementsByTagName('a')[0].href.split('&')[0].replace(/[^\/]*\/\/[^\/]*/, '');

        li].innerHTML += ' [<a href="' + article + '&fakeaction=rollback&vandal=' + vandal + '&token=' + hex_md5(article + vandal + document.cookie) + '">' + rollbacklink + '</a>]';

      }

    }

  }

}



// -----------------------------------------------------------------------------

// Modify the page once it is loaded

// -----------------------------------------------------------------------------

if (window.addEventListener) {

  window.addEventListener("load", PerformRevert, false);

  window.addEventListener("load", AddRevertButtons, false);

} else if (window.attachEvent) {

  window.attachEvent("onload", PerformRevert);

  window.attachEvent("onload", AddRevertButtons);

}