// Some additional DHTML functions

function fetch_offset(obj) {

  var left_offset = obj.offsetLeft;

  var top_offset = obj.offsetTop;

  while ((obj = obj.offsetParent) != null) {

    left_offset += obj.offsetLeft;

    top_offset += obj.offsetTop;

  }

  return { 'left' : left_offset, 'top' : top_offset };

}

function fetch_dimensions(o) {

  var w = o.offsetWidth;

  var h = o.offsetHeight;

  return { 'w' : w, 'h' : h };

}

function findParentForm(o)

{

  if ( o.tagName == 'FORM' )

    return o;

  while(true)

  {

    o = o.parentNode;

    if ( !o )

      return false;

    if ( o.tagName == 'FORM' )

      return o;

  }

  return false;

}

function ajaxReverseDNS(o, text)

{

  if(text) var ipaddr = text;

  else var ipaddr = o.innerHTML;

  rDnsObj = o;

  rDnsBannerObj = bannerOn('Retrieving reverse DNS info...');

  ajaxGet(stdAjaxPrefix+'&_mode=rdns&ip='+ipaddr, function() {

      if(ajax.readyState == 4)

      {

        off = fetch_offset(rDnsObj);

        dim = fetch_dimensions(rDnsObj);

        right = off['left'] + dim['w'];

        top = off['top'] + dim['h'];

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

        thediv.className = 'info-box';

        thediv.style.margin = '0';

        thediv.style.position = 'absolute';

        thediv.style.top  = top  + 'px';

        thediv.style.display = 'none';

        thediv.style.zIndex = getHighestZ() + 2;

        thediv.id = 'mdgDynamic_rDnsInfoDiv_'+Math.floor(Math.random() * 1000000);

        thediv.innerHTML = '<b>Reverse DNS:</b><br />'+ajax.responseText+' <a href="#" onclick="elem = document.getElementById(\''+thediv.id+'\'); elem.innerHTML = \'\'; elem.style.display = \'none\';return false;">Close</a>';

        var body = document.getElementsByTagName('body');

        body = body[0];

        bannerOff(rDnsBannerObj);

        body.appendChild(thediv);

        thediv.style.display = 'block';

        left = fetch_dimensions(thediv);

        thediv.style.display = 'none';

        left = right - left['w'];

        thediv.style.left = left + 'px';

        thediv.style.display = 'block';

        fadeInfoBoxes();

      }

    });

}

function bannerOn(text)

{

  darken(true);

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

  thediv.className = 'mdg-comment';

  thediv.style.padding = '0';

  thediv.style.marginLeft = '0';

  thediv.style.position = 'absolute';

  thediv.style.display = 'none';

  thediv.style.padding = '4px';

  thediv.style.fontSize = '14pt';

  thediv.id = 'mdgDynamic_bannerDiv_'+Math.floor(Math.random() * 1000000);

  thediv.innerHTML = text;

  var body = document.getElementsByTagName('body');

  body = body[0];

  body.appendChild(thediv);

  body.style.cursor = 'wait';

  thediv.style.display = 'block';

  dim = fetch_dimensions(thediv);

  thediv.style.display = 'none';

  bdim = { 'w' : getWidth(), 'h' : getHeight() };

  so = getScrollOffset();

  var left = (bdim['w'] / 2) - ( dim['w'] / 2 );

  var top  = (bdim['h'] / 2);

  top  = top - ( dim['h'] / 2 );

  top = top + so;

  thediv.style.top  = top  + 'px';

  thediv.style.left = left + 'px';

  thediv.style.display = 'block';

  return thediv.id;

}

function bannerOff(id)

{

  e = document.getElementById(id);

  if(!e) return;

  e.innerHTML = '';

  e.style.display = 'none';

  var body = document.getElementsByTagName('body');

  body = body[0];

  body.style.cursor = 'default';

  enlighten(true);

}

function disableUnload(message)

{

  if(typeof message != 'string') message = 'You may want to save your changes first.';

  var body = document.getElementsByTagName('body');

  body = body[0];

  body.onbeforeunload='return unescape(\''+escape(message)+'\')';

}

function enableUnload()

{

  var body = document.getElementsByTagName('body');

  body = body[0];

  body.onbeforeunload = null;

}

/**

 * Gets the highest z-index of all divs in the document

 * @return integer

 */

function getHighestZ()

{

  z = 0;

  var divs = document.getElementsByTagName('div');

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

  {

    if(divs[i].style.zIndex > z) z = divs[i].style.zIndex;

  }

  return z;

}

function isKeyPressed(event)

{

  if (event.shiftKey==1)

  {

    shift = true;

  }

  else

  {

    shift = false;

  }

}

function moveDiv(div, newparent)

{

  var backup = div;

  var oldparent = div.parentNode;

  oldparent.removeChild(div);

  newparent.appendChild(backup);

}

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);}

var busyBannerID;

function goBusy(msg)

{

  if(!msg) msg = 'Please wait...';

  body = document.getElementsByTagName('body');

  body = body[0];

  body.style.cursor = 'wait';

  busyBannerID = bannerOn(msg);

}

function unBusy()

{

  body = document.getElementsByTagName('body');

  body = body[0];

  body.style.cursor = 'default';

  bannerOff(busyBannerID);

}

function setAjaxLoading()

{

  if ( document.getElementById('ajaxloadicon') )

  {

    document.getElementById('ajaxloadicon').src=ajax_load_icon;

  }

}

function unsetAjaxLoading()

{

  if ( document.getElementById('ajaxloadicon') )

  {

    document.getElementById('ajaxloadicon').src=scriptPath + '/images/spacer.gif';

  }

}

/*

 * Search boxes

 */

function buildSearchBoxes()

{

  var divs = document.getElementsByTagName('*');

  var boxes = new Array();

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

  {

    if ( divs[i].className)

    {

      if ( divs[i].className.substr(0, 9) == 'searchbox' )

      {

        boxes.push(divs[i]);

      }

    }

  }

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

  {

    if ( boxes[i].className.match(/^searchbox\[([0-9]+)px\]$/) )

    {

      var width = boxes[i].className.match(/^searchbox\[([0-9]+)px\]$/);

      width = parseInt(width[1]);

    }

    else

    {

      var width = 120;

    }

    createSearchBox(boxes[i], width);

  }

}

function createSearchBox(parent, width)

{

  if ( typeof(parent) != 'object')

  {

    alert('BUG: createSearchBox(): parent is not an object');

    return false;

  }

  //parent.style.padding = '0px';

  //parent.style.textAlign = 'center';

  parent.style.width = width + 'px';

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

  submit.onclick = function() { searchFormSubmit(this); };

  submit.className = 'js-search-submit';

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

  input.className = 'js-search-box';

  input.value = 'Search';

  input.name = 'q';

  input.style.width = ( width - 28 ) + 'px';

  input.onfocus = function() { if ( this.value == 'Search' ) this.value = ''; };

  input.onblur  = function() { if ( this.value == '' ) this.value = 'Search'; };

  parent.appendChild(input);

  var off = fetch_offset(input);

  var top = off['top'] + 'px';

  var left = ( parseInt(off['left']) + ( width - 24 ) ) + 'px';

  submit.style.top = top;

  submit.style.left = left;

  parent.appendChild(submit);

}

function searchFormSubmit(obj)

{

  var input = obj.previousSibling;

  if ( input.value == 'Search' || input.value == '' )

    return false;

  var p = obj;

  while(true)

  {

    p = p.parentNode;

    if ( !p )

      break;

    if ( typeof(p.tagName) != 'string' )

      break;

    else if ( p.tagName.toLowerCase() == 'form' )

    {

      p.submit();

    }

    else if ( p.tagName.toLowerCase() == 'body' )

    {

      break;

    }

  }

}

/*

 * AJAX login box (experimental)

 */

var ajax_auth_prompt_cache = false;

var ajax_auth_mb_cache = false;

var ajax_auth_level_cache = false;

var ajax_auth_error_string = false;

function ajaxPromptAdminAuth(call_on_ok, level)

{

  if ( typeof(call_on_ok) == 'function' )

  {

    ajax_auth_prompt_cache = call_on_ok;

  }

  if ( !level )

    level = USER_LEVEL_MEMBER;

  ajax_auth_level_cache = level;

  var loading_win = '<div align="center" style="text-align: center;"> \

      <p>Fetching an encryption key...</p> \

      <p><small>Not working? Use the <a href="'+makeUrlNS('Special', 'Login/' + title)+'">alternate login form</a>.</p> \

      <p><img alt="Please wait..." src="'+scriptPath+'/images/loading-big.gif" /></p> \

    </div>';

  var title = ( level > USER_LEVEL_MEMBER ) ? 'You are requesting a sensitive operation.' : 'Please enter your username and password to continue.';

  ajax_auth_mb_cache = new messagebox(MB_OKCANCEL|MB_ICONLOCK, title, loading_win);

  ajax_auth_mb_cache.onbeforeclick['OK'] = ajaxValidateLogin;

  ajaxAuthLoginInnerSetup();

}

function ajaxAuthLoginInnerSetup()

{

  // let's hope this gets the image cached

  var _ = new Image(32, 32); 

  _.src = scriptPath + "/images/good.gif";

  ajaxGet(makeUrlNS('Special', 'Login', 'act=getkey'), function() {

      if ( ajax.readyState == 4 )

      {

        var response = String(ajax.responseText);

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

        {

          handle_invalid_json(response);

          ajax_auth_mb_cache.destroy();

          return false;

        }

        response = parseJSON(response);

        var level = ajax_auth_level_cache;

        var form_html = '';

        var shown_error = false;

        if ( ajax_auth_error_string )

        {

          shown_error = true;

          form_html += '<div class="error-box-mini" id="ajax_auth_error">' + ajax_auth_error_string + '</div>';

          ajax_auth_error_string = false;

        }

        else if ( level > USER_LEVEL_MEMBER )

        {

          form_html += 'Please re-enter your login details, to verify your identity.<br /><br />';

        }

        form_html += ' \

          <form action="#" onsubmit="ajaxValidateLogin(); return false;" name="ajax_login_form"> \

            <table border="0" align="center"> \

              <tr> \

                <td>Username:</td><td><input name="username" tabindex="1" id="ajaxlogin_user" type="text"     size="25" /> \

              </tr> \

              <tr> \

                <td>Password:</td><td><input name="password" tabindex="2" id="ajaxlogin_pass" type="password" size="25" /> \

              </tr> \

              <tr> \

                <td colspan="2" style="text-align: center;"> \

                  <br /><small>Trouble logging in? Try the <a href="'+makeUrlNS('Special', 'Login/' + title, 'level=' + level)+'">full login form</a>.<br />';

       if ( level <= USER_LEVEL_MEMBER )

       {

         form_html += ' \

                  Did you <a href="'+makeUrlNS('Special', 'PasswordReset')+'">forget your password</a>?<br /> \

                  Maybe you need to <a href="'+makeUrlNS('Special', 'Register')+'">create an account</a>.</small>';

       }

       form_html += ' \

                </td> \

              </tr> \

            </table> \

            <input type="hidden" id="ajaxlogin_crypt_key"       value="' + response.key + '" /> \

            <input type="hidden" id="ajaxlogin_crypt_challenge" value="' + response.challenge + '" /> \

          </form>';

        ajax_auth_mb_cache.updateContent(form_html);

        $('messageBox').object.nextSibling.firstChild.tabindex = '3';

        if ( typeof(response.username) == 'string' )

        {

          $('ajaxlogin_user').object.value = response.username;

          if ( IE )

          {

            setTimeout("document.forms['ajax_login_form'].password.focus();", 200);

          }

          else

          {

            $('ajaxlogin_pass').object.focus();

          }

        }

        else

        {

          if ( IE )

          {

            setTimeout("document.forms['ajax_login_form'].username.focus();", 200);

          }

          else

          {

            $('ajaxlogin_user').object.focus();

          }

        }

        $('ajaxlogin_pass').object.onblur = function(e) { if ( !shift ) $('messageBox').object.nextSibling.firstChild.focus(); };

        $('ajaxlogin_pass').object.onkeypress = function(e)

        {

          // Trigger a form submit when the password field is focused and the user presses enter

          // IE doesn't give us an event object when it should - check window.event. If that

          // still fails, give up.

          if ( !e )

          {

            e = window.event;

          }

          if ( !e && IE )

          {

            return true;

          }

          if ( e.keyCode == 13 )

          {

            ajaxValidateLogin();

          }

        };

        /*

        ## This causes the background image to disappear under Fx 2

        if ( shown_error )

        {

          // fade to #FFF4F4

          var fader = new Spry.Effect.Highlight('ajax_auth_error', {duration: 1000, from: '#FFF4F4', to: '#805600', restoreColor: '#805600', finish: function()

              {

                var fader = new Spry.Effect.Highlight('ajax_auth_error', {duration: 3000, from: '#805600', to: '#FFF4F4', restoreColor: '#FFF4F4'});

                fader.start();

          }});

          fader.start();

        }

        */

      }

    });

}

function ajaxValidateLogin()

{

  var username,password,auth_enabled,crypt_key,crypt_data,challenge_salt,challenge_data;

  username = document.getElementById('ajaxlogin_user');

  if ( !username )

    return false;

  username = document.getElementById('ajaxlogin_user').value;

  password = document.getElementById('ajaxlogin_pass').value;

  auth_enabled = false;

  disableJSONExts();

  //

  // Encryption test

  //

  var str = '';

  for(i=0;i<keySizeInBits/4;i++)

  {

    str+='0';

  }

  str = hexToByteArray(str);

  var ct  = rijndaelEncrypt(str, str, 'ECB');

  ct      = byteArrayToHex(ct);

  var v;

  switch(keySizeInBits)

  {

    case 128:

      v = '66e94bd4ef8a2c3b884cfa59ca342b2e';

      break;

    case 192:

      v = 'aae06992acbf52a3e8f4a96ec9300bd7aae06992acbf52a3e8f4a96ec9300bd7';

      break;

    case 256:

      v = 'dc95c078a2408989ad48a21492842087dc95c078a2408989ad48a21492842087';

      break;

  }

  auth_enabled = ( ct == v && md5_vm_test() );

  if ( !auth_enabled )

  {

    alert('Login error: encryption sanity check failed\n');

    return true;

  }

  crypt_key = document.getElementById('ajaxlogin_crypt_key').value;

  challenge_salt = document.getElementById('ajaxlogin_crypt_challenge').value;

  var crypt_key_md5 = hex_md5(crypt_key);

  challenge_data = hex_md5(password + challenge_salt) + challenge_salt;

  password = stringToByteArray(password);

  crypt_key = hexToByteArray(crypt_key);

  crypt_data = rijndaelEncrypt(password, crypt_key, 'ECB');

  crypt_data = byteArrayToHex(crypt_data);

  var json_data = {

    'username' : username,

    'crypt_key' : crypt_key_md5,

    'challenge' : challenge_data,

    'crypt_data' : crypt_data,

    'level' : ajax_auth_level_cache

  };

  json_data = toJSONString(json_data);

  json_data = encodeURIComponent(json_data);

  var loading_win = '<div align="center" style="text-align: center;"> \

      <p>Logging in...</p> \

      <p><img alt="Please wait..." src="'+scriptPath+'/images/loading-big.gif" /></p> \

    </div>';

  ajax_auth_mb_cache.updateContent(loading_win);