// 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 && ajax.status == 200 )

      {

        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.';

  window._unloadmsg = message;

  window.onbeforeunload = function(e)

  {

    if ( !e )

      e = window.event;

    e.returnValue = window._unloadmsg;

  }

}

function enableUnload()

{

  window._unloadmsg = null;

  window.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)

 * Moved / rewritten in login.js

 */

// Included only for API-compatibility

function ajaxPromptAdminAuth(call_on_ok, level)

{

  ajaxLogonInit(call_on_ok, level);

}

// This code is in the public domain. Feel free to link back to http://jan.moesen.nu/

function sprintf()

{

  if (!arguments || arguments.length < 1 || !RegExp)

  {

    return;

  }

  var str = arguments[0];

  var re = /([^%]*)%('.|0|\x20)?(-)?(\d+)?(\.\d+)?(%|b|c|d|u|f|o|s|x|X)(.*)/;

  var a = b = [], numSubstitutions = 0, numMatches = 0;

  while (a = re.exec(str))

  {

    var leftpart = a[1], pPad = a[2], pJustify = a[3], pMinLength = a[4];

    var pPrecision = a[5], pType = a[6], rightPart = a[7];

    //alert(a + '\n' + [a[0], leftpart, pPad, pJustify, pMinLength, pPrecision);

    numMatches++;

    if (pType == '%')

    {

      subst = '%';

    }

    else

    {

      numSubstitutions++;

      if (numSubstitutions >= arguments.length)

      {

        alert('Error! Not enough function arguments (' + (arguments.length - 1) + ', excluding the string)\nfor the number of substitution parameters in string (' + numSubstitutions + ' so far).');

      }

      var param = arguments[numSubstitutions];

      var pad = '';

             if (pPad && pPad.substr(0,1) == "'") pad = leftpart.substr(1,1);

        else if (pPad) pad = pPad;

      var justifyRight = true;

             if (pJustify && pJustify === "-") justifyRight = false;

      var minLength = -1;

             if (pMinLength) minLength = parseInt(pMinLength);

      var precision = -1;

             if (pPrecision && pType == 'f') precision = parseInt(pPrecision.substring(1));

      var subst = param;

             if (pType == 'b') subst = parseInt(param).toString(2);

        else if (pType == 'c') subst = String.fromCharCode(parseInt(param));

        else if (pType == 'd') subst = parseInt(param) ? parseInt(param) : 0;

        else if (pType == 'u') subst = Math.abs(param);

        else if (pType == 'f') subst = (precision > -1) ? Math.round(parseFloat(param) * Math.pow(10, precision)) / Math.pow(10, precision): parseFloat(param);

        else if (pType == 'o') subst = parseInt(param).toString(8);

        else if (pType == 's') subst = param;

        else if (pType == 'x') subst = ('' + parseInt(param).toString(16)).toLowerCase();

        else if (pType == 'X') subst = ('' + parseInt(param).toString(16)).toUpperCase();

    }

    str = leftpart + subst + rightPart;

  }

  return str;

}

/**

 * Insert a DOM object _after_ the specified child.

 * @param object Parent node

 * @param object Node to insert

 * @param object Node to insert after

 */

function insertAfter(parent, baby, bigsister)

{

  try

  {

    if ( parent.childNodes[parent.childNodes.length-1] == bigsister )

      parent.appendChild(baby);

    else

      parent.insertBefore(baby, bigsister.nextSibling);

  }

  catch(e)

  {

    alert(e.toString());

    if ( window.console )

    {

      // Firebug support

      window.console.warn(e);

    }

  }

}

/**

 * Validates an e-mail address.

 * @param string E-mail address

 * @return bool

 */

function validateEmail(email)

{

  return ( email.match(/^(?:[\w\d_-]+\.?)+@((?:(?:[\w\d_-]\-?)+\.)+\w{2,4}|localhost)$/) ) ? true : false;

}

/**

 * Validates a username.

 * @param string Username to test

 * @return bool

 */

function validateUsername(username)

{

  var regex = new RegExp('^[^<>&\?\'"%\n\r/]+$', '');

  return ( username.match(regex) ) ? true : false;

}

/**

 * Equivalent of PHP's time()

 * @return int

 */

function unix_time()

{

  return parseInt((new Date()).getTime()/1000);

}

/*

 * Utility functions, moved from windows.js

 */

// getElementWidth() and getElementHeight()

// Source: http://www.aspandjavascript.co.uk/javascript/javascript_api/get_element_width_height.asp

function getElementHeight(Elem) {

  if (ns4) 

  {

    var elem = getObjNN4(document, Elem);

    return elem.clip.height;

  } 

  else

  {

    if(document.getElementById) 

    {

      var elem = document.getElementById(Elem);

    }

    else if (document.all)

    {

      var elem = document.all[Elem];

    }

    if (op5) 

    { 

      xPos = elem.style.pixelHeight;

    }

    else

    {

      xPos = elem.offsetHeight;

    }

    return xPos;

  } 

}

function getElementWidth(Elem) {

  if (ns4) {

    var elem = getObjNN4(document, Elem);

    return elem.clip.width;

  } else {

    if(document.getElementById) {

      var elem = document.getElementById(Elem);

    } else if (document.all){

      var elem = document.all[Elem];

    }

    if (op5) {

      xPos = elem.style.pixelWidth;

    } else {

      xPos = elem.offsetWidth;

    }

    return xPos;

  }

}

function getHeight() {

  var myHeight = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myHeight = window.innerHeight;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {

    myHeight = document.documentElement.clientHeight;

  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {

    myHeight = document.body.clientHeight;

  }

  return myHeight;

}

function getWidth() {

  var myWidth = 0;

  if( typeof( window.innerWidth ) == 'number' ) {

    myWidth = window.innerWidth;

  } else if( document.documentElement &&

      ( document.documentElement.clientWidth || document.documentElement.clientWidth ) ) {

    myWidth = document.documentElement.clientWidth;

  } else if( document.body && ( document.body.clientWidth || document.body.clientWidth ) ) {

    myWidth = document.body.clientWidth;

  }

  return myWidth;

}

/**

 * Sanitizes a page URL string so that it can safely be stored in the database.

 * @param string Page ID to sanitize

 * @return string Cleaned text

 */

function sanitize_page_id(page_id)

{

  // Remove character escapes

  page_id = dirtify_page_id(page_id);