/*==================================================
  $Id: listtabber.js,v 1.9 2006/04/27 20:51:51 pat Exp $
  listtabber.js by Patrick Fitzgerald pat@barelyfitz.com
  Documentation can be found at the following URL:
  http://www.barelyfitz.com/projects/listtabber/
  License (http://www.opensource.org/licenses/mit-license.php)
  Copyright (c) 2006 Patrick Fitzgerald

  ==================================================*/

function listtabberObj(argsObj)
{
  var arg; 

  this.div = null;

  this.classMain = "listtabber";

  this.classMainLive = "listtabberlive";

  this.classTab = "listtabbertab";

  this.classTabDefault = "listtabbertabdefault";

  this.classNav = "listtabbernav";

  this.classTabHide = "listtabbertabhide";

  this.classNavActive = "listtabberactive";

  this.titleElements = ['h2','h3','h4','h5','h6'];

  this.titleElementsStripHTML = true;

  this.removeTitle = true;
  this.addLinkId = false;

  this.linkIdFormat = '<listtabberid>nav<tabnumberone>';

  for (arg in argsObj) { this[arg] = argsObj[arg]; }

  this.REclassMain = new RegExp('\\b' + this.classMain + '\\b', 'gi');
  this.REclassMainLive = new RegExp('\\b' + this.classMainLive + '\\b', 'gi');
  this.REclassTab = new RegExp('\\b' + this.classTab + '\\b', 'gi');
  this.REclassTabDefault = new RegExp('\\b' + this.classTabDefault + '\\b', 'gi');
  this.REclassTabHide = new RegExp('\\b' + this.classTabHide + '\\b', 'gi');

  this.tabs = new Array();

  if (this.div) {
    this.init(this.div);
    this.div = null;
  }
}


/*--------------------------------------------------
  Methods for listtabberObj
  --------------------------------------------------*/
listtabberObj.prototype.init = function(e)
{

  var
 childNodes, 
  i, i2, 
  t, 
  defaultTab=0, 
  DOM_ul, 
  DOM_li, 
  DOM_a, 
  aId, 
  headingElement; 

  if (!document.getElementsByTagName) { return false; }

  if (e.id) {
    this.id = e.id;
  }

  this.tabs.length = 0;

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

    if(childNodes[i].className &&
       childNodes[i].className.match(this.REclassTab)) {
      
      t = new Object();
      
      t.div = childNodes[i];
      
      this.tabs[this.tabs.length] = t;

      if (childNodes[i].className.match(this.REclassTabDefault)) {
	defaultTab = this.tabs.length-1;
      }
    }
  }

  DOM_ul = document.createElement("ul");
  DOM_ul.className = this.classNav;
  
  for (i=0; i < this.tabs.length; i++) {

    t = this.tabs[i];

    t.headingText = t.div.title;

    if (this.removeTitle) { t.div.title = ''; }

    if (!t.headingText) {

      for (i2=0; i2<this.titleElements.length; i2++) {
	headingElement = t.div.getElementsByTagName(this.titleElements[i2])[0];
	if (headingElement) {
	  t.headingText = headingElement.innerHTML;
	  if (this.titleElementsStripHTML) {
	    t.headingText.replace(/<br>/gi," ");
	    t.headingText = t.headingText.replace(/<[^>]+>/g,"");
	  }
	  break;
	}
      }
    }

    if (!t.headingText) {
      t.headingText = i + 1;
    }

    DOM_li = document.createElement("li");

    t.li = DOM_li;

    DOM_a = document.createElement("a");
    DOM_a.appendChild(document.createTextNode(t.headingText));
    DOM_a.href = "javascript:void(null);";
    DOM_a.title = t.headingText;
    DOM_a.onclick = this.navClick;

    DOM_a.listtabber = this;
    DOM_a.listtabberIndex = i;

    if (this.addLinkId && this.linkIdFormat) {

      aId = this.linkIdFormat;
      aId = aId.replace(/<listtabberid>/gi, this.id);
      aId = aId.replace(/<tabnumberzero>/gi, i);
      aId = aId.replace(/<tabnumberone>/gi, i+1);
      aId = aId.replace(/<tabtitle>/gi, t.headingText.replace(/[^a-zA-Z0-9\-]/gi, ''));

      DOM_a.id = aId;
    }

    DOM_li.appendChild(DOM_a);

    DOM_ul.appendChild(DOM_li);
  }

  e.insertBefore(DOM_ul, e.firstChild);

  e.className = e.className.replace(this.REclassMain, this.classMainLive);

  this.tabShow(defaultTab);

  if (typeof this.onLoad == 'function') {
    this.onLoad({listtabber:this});
  }

  return this;
};


listtabberObj.prototype.navClick = function(event)
{

  var
  rVal,
  a, 
  self,
  listtabberIndex, 
  onClickArgs; 

  a = this;
  if (!a.listtabber) { return false; }

  self = a.listtabber;
  listtabberIndex = a.listtabberIndex;

  a.blur();

  if (typeof self.onClick == 'function') {

    onClickArgs = {'listtabber':self, 'index':listtabberIndex, 'event':event};

    if (!event) { onClickArgs.event = window.event; }

    rVal = self.onClick(onClickArgs);
    if (rVal === false) { return false; }
  }

  self.tabShow(listtabberIndex);

  return false;
};


listtabberObj.prototype.tabHideAll = function()
{
  var i; 

  for (i = 0; i < this.tabs.length; i++) {
    this.tabHide(i);
  }
};


listtabberObj.prototype.tabHide = function(listtabberIndex)
{
  var div;

  if (!this.tabs[listtabberIndex]) { return false; }

  div = this.tabs[listtabberIndex].div;

  if (!div.className.match(this.REclassTabHide)) {
    div.className += ' ' + this.classTabHide;
  }
  this.navClearActive(listtabberIndex);

  return this;
};


listtabberObj.prototype.tabShow = function(listtabberIndex)
{
  var div;

  if (!this.tabs[listtabberIndex]) { return false; }

  this.tabHideAll();

  div = this.tabs[listtabberIndex].div;

  div.className = div.className.replace(this.REclassTabHide, '');

  this.navSetActive(listtabberIndex);

  if (typeof this.onTabDisplay == 'function') {
    this.onTabDisplay({'listtabber':this, 'index':listtabberIndex});
  }

  return this;
};

listtabberObj.prototype.navSetActive = function(listtabberIndex)
{
  this.tabs[listtabberIndex].li.className = this.classNavActive;

  return this;
};


listtabberObj.prototype.navClearActive = function(listtabberIndex)
{
  this.tabs[listtabberIndex].li.className = '';

  return this;
};


/*==================================================*/


function listtabberAutomatic(listtabberArgs)
{
  var
    tempObj,
    divs,
    i;

  if (!listtabberArgs) { listtabberArgs = {}; }

  tempObj = new listtabberObj(listtabberArgs);

  divs = document.getElementsByTagName("div");
  for (i=0; i < divs.length; i++) {
    
    if (divs[i].className &&
	divs[i].className.match(tempObj.REclassMain)) {
      
      listtabberArgs.div = divs[i];
      divs[i].listtabber = new listtabberObj(listtabberArgs);
    }
  }
  
  return this;
}


/*==================================================*/


function listtabberAutomaticOnLoad(listtabberArgs)
{
  var oldOnLoad;

  if (!listtabberArgs) { listtabberArgs = {}; }

  oldOnLoad = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = function() {
      listtabberAutomatic(listtabberArgs);
    };
  } else {
    window.onload = function() {
      oldOnLoad();
      listtabberAutomatic(listtabberArgs);
    };
  }
}


/*==================================================*/


if (typeof listtabberOptions == 'undefined') {

    listtabberAutomaticOnLoad();

} else {

  if (!listtabberOptions['manualStartup']) {
    listtabberAutomaticOnLoad(listtabberOptions);
  }

}