/**
 *	ImageFlow 0.9 - Hacked version for Shadowbox compatibility
 *
 *	This code is based on Michael L. Perrys Cover flow in Javascript.
 *	For he wrote that "You can take this code and use it as your own" [1]
 *	this is my attempt to improve some things. Feel free to use it! If
 *	you have any questions on it leave me a message in my shoutbox [2].
 *
 *	The reflection is generated server-sided by a slightly hacked  
 *	version of Richard Daveys easyreflections [3] written in PHP.
 *	
 *	The mouse wheel support is an implementation of Adomas Paltanavicius
 *	JavaScript mouse wheel code [4].
 *
 *	Thanks to Stephan Droste ImageFlow is now compatible with Safari 1.x.
 *
 *
 *	[1] http://www.adventuresinsoftware.com/blog/?p=104#comment-1981
 *	[2] http://shoutbox.finnrudolph.de/
 *	[3] http://reflection.corephp.co.uk/v2.php
 *	[4] http://adomas.org/javascript-mouse-wheel/
 */


/* Configuration variables */
var conf_reflection_p = 0.5;         // Sets the height of the reflection in % of the source image 
var conf_focus = 4;                  // Sets the numbers of images on each side of the focussed one
var conf_slider_width = 14;          // Sets the px width of the slider div
var conf_images_cursor = 'pointer';  // Sets the cursor type for all images default is 'default'
var conf_slider_cursor = 'default';  // Sets the slider cursor type: try "e-resize" default is 'default'

/* Id names used in the HTML */
var conf_imageflow = 'imageflow';    // Default is 'imageflow'
var conf_loading = 'loading';        // Default is 'loading'
var conf_images = 'images';          // Default is 'images'
var conf_captions = 'captions';      // Default is 'captions'
var conf_scrollbar = 'scrollbar';    // Default is 'scrollbar'
var conf_slider = 'slider';          // Default is 'slider'

/* Define global variables */
var caption_id = 0;
var new_caption_id = 0;
var current = 0;
var target = 0;
var mem_target = 0;
var timer = 0;
var array_images = new Array();
var new_slider_pos = 0;
var dragging = false;
var dragobject = null;
var dragx = 0;
var posx = 0;
var new_posx = 0;
var xstep = 150;
var startItem = 2;
var startItemParameter = 'p';


function step()
{
	switch (target < current-1 || target > current+1) 
	{
		case true:
			moveTo(current + (target-current)/3);
			window.setTimeout(step, 50);
			timer = 1;
			break;

		default:
			timer = 0;
			break;
	}
}

function glideTo(x, new_caption_id)
{	
	/* Animate gliding to new x position */
	target = x;
	mem_target = x;
	if (timer == 0)
	{
		window.setTimeout(step, 50);
		timer = 1;
	}
	
	/* Display new caption */
	caption_id = new_caption_id;
	caption = image_array[caption_id].getAttribute('alt');
	if (caption == '') caption = '&nbsp;';
	caption_div.innerHTML = caption;

	/* Set scrollbar slider to new position */
	if (dragging == false)
	{
		new_slider_pos = (scrollbar_width * (-(x*100/((max-1)*xstep))) / 100) - new_posx;
		slider_div.style.marginLeft = (new_slider_pos - conf_slider_width) + 'px';
	}
}

function moveTo(x)
{
	current = x;
	var zIndex = max;
	
	/* Main loop */
	for (var index = 0; index < max; index++)
	{
		var image = image_array[index];
		var current_image = index * -xstep;

		/* Don't display images that are not conf_focussed */
		if ((current_image+max_conf_focus) < mem_target || (current_image-max_conf_focus) > mem_target)
		{
			image.style.visibility = 'hidden';
			image.style.display = 'none';
		}
		else 
		{
			var z = Math.sqrt(10000 + x * x) + 100;
			var xs = x / z * size + size;

			/* Still hide images until they are processed, but set display style to block */
			image.style.display = 'block';
		
			/* Process new image height and image width */
			var new_img_h = (image.h / image.w * image.pc) / z * size;
			switch ( new_img_h > max_height )
			{
				case false:
					var new_img_w = image.pc / z * size;
					break;

				default:
					new_img_h = max_height;
					var new_img_w = image.w * new_img_h / image.h;
					break;
			}
			
			//customized code by kaya: don't stretch images
			var leftAdd = 0;
			if(new_img_h > image.h) new_img_h = image.h;
			if(new_img_w > image.w){
				 leftAdd = (new_img_w - image.w)/2;
				 new_img_w = image.w;
			} 
			
			var new_img_top = (images_width * 0.34 - new_img_h) + images_top + ((new_img_h / (conf_reflection_p + 1)) * conf_reflection_p);

			/* Set new image properties */
			image.style.left = xs - (image.pc / 2) / z * size + images_left + leftAdd + 'px';
			if(new_img_w && new_img_h)
			{ 
				image.style.height = new_img_h + 'px'; 
				image.style.width = new_img_w + 'px'; 
				image.style.top = new_img_top + 'px';
			}
			image.style.visibility = 'visible';

			/* Set image layer through zIndex */
			switch ( x < 0 )
			{
				case true:
					zIndex++;
					break;

				default:
					zIndex = zIndex - 1;
					break;
			}
			
			/* Change zIndex and onclick function of the focussed image */
			switch ( image.i == caption_id )
			{
				case false:
					image.onclick = function() { glideTo(this.x_pos, this.i); }
					break;

				default:
					zIndex = zIndex + 1;
					if(image.url !== null && image.url !== '')
					{
					image.onclick = function() { document.location = this.url; }
					}
					break;
			}
			image.style.zIndex = zIndex;
		}
		x += xstep;
	}
}

/* Main function */
function refresh(onload)
{
	/* Cache document objects in global variables */
	imageflow_div = document.getElementById(conf_imageflow);
	img_div = document.getElementById(conf_images);
	scrollbar_div = document.getElementById(conf_scrollbar);
	slider_div = document.getElementById(conf_slider);
	caption_div = document.getElementById(conf_captions);

	/* Cache global variables, that only change on refresh */
	images_width = img_div.offsetWidth;
	images_top = imageflow_div.offsetTop;
	images_left = imageflow_div.offsetLeft;
	max_conf_focus = conf_focus * xstep;
	size = images_width * 0.5;
	scrollbar_width = images_width * 0.6;
	conf_slider_width = conf_slider_width * 0.5;
	max_height = images_width * 0.51;

	/* Change imageflow div properties */
	imageflow_div.style.height = max_height + 'px';

	/* Change images div properties */
	img_div.style.height = images_width * 0.338 + 'px';

	/* Change captions div properties */
	caption_div.style.width = images_width + 'px';
	caption_div.style.marginTop = images_width * 0.03 + 'px';

	/* Change scrollbar div properties */
	scrollbar_div.style.marginTop = images_width * 0.02 + 'px';
	scrollbar_div.style.marginLeft = images_width * 0.2 + 'px';
	scrollbar_div.style.width = scrollbar_width + 'px';
	
	/* Set slider attributes */
	slider_div.onmousedown = function () { dragstart(this); };
	slider_div.style.cursor = conf_slider_cursor;


	/* Get only the images */
	image_array = img_div.getElementsByTagName('img');

	/* Cache EVERYTHING! */
	max = image_array.length;
	var i = 0;
	for (var index = 0; index < max; index++)
	{ 
		var image = image_array[index];

			array_images[i] = index;
			
			/* Set image onclick by adding i and x_pos as attributes! */
			image.onclick = function() { glideTo(this.x_pos, this.i); }
			image.x_pos = (-i * xstep);
			image.i = i;
			
		
			/* Add width and height as attributes ONLY once onload */
			if(onload == true)
			{
				image.w = image.width;
				image.h = image.height;
			}

			/* Check source image format. Get image height minus reflection height! */
			switch ((image.w + 1) > (image.h / (conf_reflection_p + 1))) 
			{
				/* Landscape format */
				case true:
					image.pc = 118;
					break;

				/* Portrait and square format */
				default:
					image.pc = 100;
					break;
			}

		        /* Set ondblclick event only if the longdesc attribute is set and not empty */
			image.url = image.getAttribute('longdesc');
		        if(image.url !== null && image.url !== '')
		        {
			     image.ondblclick = function() { document.location = this.url; }
		        }

			/* Set image cursor type */
			image.style.cursor = conf_images_cursor;

			i++;
	}
	max = array_images.length;

	/* Display images in current order */
	moveTo(current);
	glideTo(current, caption_id);
}

/* Show/hide element functions */
function show(id)
{
	var element = document.getElementById(id);
	element.style.visibility = 'visible';
}
function hide(id)
{
	var element = document.getElementById(id);
	element.style.visibility = 'hidden';
	element.style.display = 'none';
}

function getRequestParameter( name )
{
 name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
 var regexS = "[\\?&]"+name+"=([^&#]*)";
 var regex = new RegExp( regexS );
 var results = regex.exec( window.location.href );
 if( results == null )
   return "";
 else
   return results[1];
}

/* Hide loading bar, show content and initialize mouse event listening after loading */
window.onload = function()
{
	if(document.getElementById(conf_imageflow))
	{
		hide(conf_loading);
		refresh(true);
		show(conf_images);
		show(conf_scrollbar);
		initMouseWheel();
		initMouseDrag();
                var tmp = getRequestParameter(startItemParameter);
		if(tmp != "") startItem = tmp;
		glideTo( (-1*xstep)*(startItem-1), startItem-1);
	}
}

/* Refresh ImageFlow on window resize */
window.onresize = function()
{
	if(document.getElementById(conf_imageflow)) refresh();
}

/* Fixes the back button issue */
window.onunload = function()
{
  document = null;
}


/* Handle the wheel angle change (delta) of the mouse wheel */
function handle(delta)
{
	var change = false;
	switch (delta > 0)
	{
		case true:
			if(caption_id >= 1)
			{
				target = target + xstep;
				new_caption_id = caption_id - 1;
				change = true;
			}
			break;

		default:
			if(caption_id < (max-1))
			{
				target = target - xstep;
				new_caption_id = caption_id + 1;
				change = true;
			}
			break;
	}

	/* Glide to next (mouse wheel down) / previous (mouse wheel up) image */
	if (change == true)
	{
		glideTo(target, new_caption_id);
	}
}

/* Event handler for mouse wheel event */
function wheel(event)
{
	var delta = 0;
	if (!event) event = window.event;
	if (event.wheelDelta)
	{
		delta = event.wheelDelta / 120;
	}
	else if (event.detail)
	{
		delta = -event.detail / 3;
	}
	if (delta) handle(delta);
	if (event.preventDefault) event.preventDefault();
	event.returnValue = false;
}

/* Initialize mouse wheel event listener */
function initMouseWheel()
{
	if(window.addEventListener) imageflow_div.addEventListener('DOMMouseScroll', wheel, false);
	imageflow_div.onmousewheel = wheel;
}

/* This function is called to drag an object (= slider div) */
function dragstart(element)
{
	dragobject = element;
	dragx = posx - dragobject.offsetLeft + new_slider_pos;
}

/* This function is called to stop dragging an object */
function dragstop()
{
	dragobject = null;
	dragging = false;
}

/* This function is called on mouse movement and moves an object (= slider div) on user action */
function drag(e)
{
	posx = document.all ? window.event.clientX : e.pageX;
	if(dragobject != null)
	{
		dragging = true;
		new_posx = (posx - dragx) + conf_slider_width;

		/* Make sure, that the slider is moved in proper relation to previous movements by the glideTo function */
		if(new_posx < ( - new_slider_pos)) new_posx = - new_slider_pos;
		if(new_posx > (scrollbar_width - new_slider_pos)) new_posx = scrollbar_width - new_slider_pos;
		
		var slider_pos = (new_posx + new_slider_pos);
		var step_width = slider_pos / ((scrollbar_width) / (max-1));
		var image_number = Math.round(step_width);
		var new_target = (image_number) * -xstep;
		var new_caption_id = image_number;

		dragobject.style.left = new_posx + 'px';
		glideTo(new_target, new_caption_id);
	}
}

/* Initialize mouse event listener */
function initMouseDrag()
{
	document.onmousemove = drag;
	document.onmouseup = dragstop;

	/* Avoid text and image selection while dragging  */
	document.onselectstart = function () 
	{
		if (dragging == true)
		{
			return false;
		}
		else
		{
			return true;
		}
	}
}

function getKeyCode(event)
{
	event = event || window.event;
	return event.keyCode;
}

document.onkeydown = function(event)
{
	var charCode  = getKeyCode(event);
	switch (charCode)
	{
		/* Right arrow key */
		case 39:
			handle(-1);
			break;
		
		/* Left arrow key */
		case 37:
			handle(1);
			break;
	}
}
/*==================================================
  $Id: tabber.js,v 1.9 2006/04/27 20:51:51 pat Exp $
  tabber.js by Patrick Fitzgerald pat@barelyfitz.com

  Documentation can be found at the following URL:
  http://www.barelyfitz.com/projects/tabber/

  License (http://www.opensource.org/licenses/mit-license.php)

  Copyright (c) 2006 Patrick Fitzgerald

  Permission is hereby granted, free of charge, to any person
  obtaining a copy of this software and associated documentation files
  (the "Software"), to deal in the Software without restriction,
  including without limitation the rights to use, copy, modify, merge,
  publish, distribute, sublicense, and/or sell copies of the Software,
  and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  ==================================================*/

function tabberObj(argsObj)
{
  var arg; /* name of an argument to override */

  /* Element for the main tabber div. If you supply this in argsObj,
     then the init() method will be called.
  */
  this.div = null;

  /* Class of the main tabber div */
  this.classMain = "tabber";

  /* Rename classMain to classMainLive after tabifying
     (so a different style can be applied)
  */
  this.classMainLive = "tabberlive";

  /* Class of each DIV that contains a tab */
  this.classTab = "tabbertab";

  /* Class to indicate which tab should be active on startup */
  this.classTabDefault = "tabbertabdefault";

  /* Class for the navigation UL */
  this.classNav = "tabbernav";

  /* When a tab is to be hidden, instead of setting display='none', we
     set the class of the div to classTabHide. In your screen
     stylesheet you should set classTabHide to display:none.  In your
     print stylesheet you should set display:block to ensure that all
     the information is printed.
  */
  this.classTabHide = "tabbertabhide";

  /* Class to set the navigation LI when the tab is active, so you can
     use a different style on the active tab.
  */
  this.classNavActive = "tabberactive";

  /* Elements that might contain the title for the tab, only used if a
     title is not specified in the TITLE attribute of DIV classTab.
  */
  this.titleElements = ['h2','h3','h4','h5','h6'];

  /* Should we strip out the HTML from the innerHTML of the title elements?
     This should usually be true.
  */
  this.titleElementsStripHTML = true;

  /* If the user specified the tab names using a TITLE attribute on
     the DIV, then the browser will display a tooltip whenever the
     mouse is over the DIV. To prevent this tooltip, we can remove the
     TITLE attribute after getting the tab name.
  */
  this.removeTitle = true;

  /* If you want to add an id to each link set this to true */
  this.addLinkId = false;

  /* If addIds==true, then you can set a format for the ids.
     <tabberid> will be replaced with the id of the main tabber div.
     <tabnumberzero> will be replaced with the tab number
       (tab numbers starting at zero)
     <tabnumberone> will be replaced with the tab number
       (tab numbers starting at one)
     <tabtitle> will be replaced by the tab title
       (with all non-alphanumeric characters removed)
   */
  this.linkIdFormat = '<tabberid>nav<tabnumberone>';

  /* You can override the defaults listed above by passing in an object:
     var mytab = new tabber({property:value,property:value});
  */
  for (arg in argsObj) { this[arg] = argsObj[arg]; }

  /* Create regular expressions for the class names; Note: if you
     change the class names after a new object is created you must
     also change these regular expressions.
  */
  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');

  /* Array of objects holding info about each tab */
  this.tabs = new Array();

  /* If the main tabber div was specified, call init() now */
  if (this.div) {

    this.init(this.div);

    /* We don't need the main div anymore, and to prevent a memory leak
       in IE, we must remove the circular reference between the div
       and the tabber object. */
    this.div = null;
  }
}


/*--------------------------------------------------
  Methods for tabberObj
  --------------------------------------------------*/


tabberObj.prototype.init = function(e)
{
  /* Set up the tabber interface.

     e = element (the main containing div)

     Example:
     init(document.getElementById('mytabberdiv'))
   */

  var
  childNodes, /* child nodes of the tabber div */
  i, i2, /* loop indices */
  t, /* object to store info about a single tab */
  defaultTab=0, /* which tab to select by default */
  DOM_ul, /* tabbernav list */
  DOM_li, /* tabbernav list item */
  DOM_a, /* tabbernav link */
  aId, /* A unique id for DOM_a */
  headingElement; /* searching for text to use in the tab */

  /* Verify that the browser supports DOM scripting */
  if (!document.getElementsByTagName) { return false; }

  /* If the main DIV has an ID then save it. */
  if (e.id) {
    this.id = e.id;
  }

  /* Clear the tabs array (but it should normally be empty) */
  this.tabs.length = 0;

  /* Loop through an array of all the child nodes within our tabber element. */
  childNodes = e.childNodes;
  for(i=0; i < childNodes.length; i++) {

    /* Find the nodes where class="tabbertab" */
    if(childNodes[i].className &&
       childNodes[i].className.match(this.REclassTab)) {
      
      /* Create a new object to save info about this tab */
      t = new Object();
      
      /* Save a pointer to the div for this tab */
      t.div = childNodes[i];
      
      /* Add the new object to the array of tabs */
      this.tabs[this.tabs.length] = t;

      /* If the class name contains classTabDefault,
	 then select this tab by default.
      */
      if (childNodes[i].className.match(this.REclassTabDefault)) {
	defaultTab = this.tabs.length-1;
      }
    }
  }

  /* Create a new UL list to hold the tab headings */
  DOM_ul = document.createElement("ul");
  DOM_ul.className = this.classNav;
  
  /* Loop through each tab we found */
  for (i=0; i < this.tabs.length; i++) {

    t = this.tabs[i];

    /* Get the label to use for this tab:
       From the title attribute on the DIV,
       Or from one of the this.titleElements[] elements,
       Or use an automatically generated number.
     */
    t.headingText = t.div.title;

    /* Remove the title attribute to prevent a tooltip from appearing */
    if (this.removeTitle) { t.div.title = ''; }

    if (!t.headingText) {

      /* Title was not defined in the title of the DIV,
	 So try to get the title from an element within the DIV.
	 Go through the list of elements in this.titleElements
	 (typically heading elements ['h2','h3','h4'])
      */
      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) {
      /* Title was not found (or is blank) so automatically generate a
         number for the tab.
      */
      t.headingText = i + 1;
    }

    /* Create a list element for the tab */
    DOM_li = document.createElement("li");

    /* Save a reference to this list item so we can later change it to
       the "active" class */
    t.li = DOM_li;

    /* Create a link to activate the tab */
    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;

    /* Add some properties to the link so we can identify which tab
       was clicked. Later the navClick method will need this.
    */
    DOM_a.tabber = this;
    DOM_a.tabberIndex = i;

    /* Do we need to add an id to DOM_a? */
    if (this.addLinkId && this.linkIdFormat) {

      /* Determine the id name */
      aId = this.linkIdFormat;
      aId = aId.replace(/<tabberid>/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;
    }

    /* Add the link to the list element */
    DOM_li.appendChild(DOM_a);

    /* Add the list element to the list */
    DOM_ul.appendChild(DOM_li);
  }

  /* Add the UL list to the beginning of the tabber div */
  e.insertBefore(DOM_ul, e.firstChild);

  /* Make the tabber div "live" so different CSS can be applied */
  e.className = e.className.replace(this.REclassMain, this.classMainLive);

  /* Activate the default tab, and do not call the onclick handler */
  this.tabShow(defaultTab);

  /* If the user specified an onLoad function, call it now. */
  if (typeof this.onLoad == 'function') {
    this.onLoad({tabber:this});
  }

  return this;
};


tabberObj.prototype.navClick = function(event)
{
  /* This method should only be called by the onClick event of an <A>
     element, in which case we will determine which tab was clicked by
     examining a property that we previously attached to the <A>
     element.

     Since this was triggered from an onClick event, the variable
     "this" refers to the <A> element that triggered the onClick
     event (and not to the tabberObj).

     When tabberObj was initialized, we added some extra properties
     to the <A> element, for the purpose of retrieving them now. Get
     the tabberObj object, plus the tab number that was clicked.
  */

  var
  rVal, /* Return value from the user onclick function */
  a, /* element that triggered the onclick event */
  self, /* the tabber object */
  tabberIndex, /* index of the tab that triggered the event */
  onClickArgs; /* args to send the onclick function */

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

  self = a.tabber;
  tabberIndex = a.tabberIndex;

  /* Remove focus from the link because it looks ugly.
     I don't know if this is a good idea...
  */
  a.blur();

  /* If the user specified an onClick function, call it now.
     If the function returns false then do not continue.
  */
  if (typeof self.onClick == 'function') {

    onClickArgs = {'tabber':self, 'index':tabberIndex, 'event':event};

    /* IE uses a different way to access the event object */
    if (!event) { onClickArgs.event = window.event; }

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

  self.tabShow(tabberIndex);

  return false;
};


tabberObj.prototype.tabHideAll = function()
{
  var i; /* counter */

  /* Hide all tabs and make all navigation links inactive */
  for (i = 0; i < this.tabs.length; i++) {
    this.tabHide(i);
  }
};


tabberObj.prototype.tabHide = function(tabberIndex)
{
  var div;

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

  /* Hide a single tab and make its navigation link inactive */
  div = this.tabs[tabberIndex].div;

  /* Hide the tab contents by adding classTabHide to the div */
  if (!div.className.match(this.REclassTabHide)) {
    div.className += ' ' + this.classTabHide;
  }
  this.navClearActive(tabberIndex);

  return this;
};


tabberObj.prototype.tabShow = function(tabberIndex)
{
  /* Show the tabberIndex tab and hide all the other tabs */

  var div;

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

  /* Hide all the tabs first */
  this.tabHideAll();

  /* Get the div that holds this tab */
  div = this.tabs[tabberIndex].div;

  /* Remove classTabHide from the div */
  div.className = div.className.replace(this.REclassTabHide, '');

  /* Mark this tab navigation link as "active" */
  this.navSetActive(tabberIndex);

  /* If the user specified an onTabDisplay function, call it now. */
  if (typeof this.onTabDisplay == 'function') {
    this.onTabDisplay({'tabber':this, 'index':tabberIndex});
  }

  return this;
};

tabberObj.prototype.navSetActive = function(tabberIndex)
{
  /* Note: this method does *not* enforce the rule
     that only one nav item can be active at a time.
  */

  /* Set classNavActive for the navigation list item */
  this.tabs[tabberIndex].li.className = this.classNavActive;

  return this;
};


tabberObj.prototype.navClearActive = function(tabberIndex)
{
  /* Note: this method does *not* enforce the rule
     that one nav should always be active.
  */

  /* Remove classNavActive from the navigation list item */
  this.tabs[tabberIndex].li.className = '';

  return this;
};


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


function tabberAutomatic(tabberArgs)
{
  /* This function finds all DIV elements in the document where
     class=tabber.classMain, then converts them to use the tabber
     interface.

     tabberArgs = an object to send to "new tabber()"
  */
  var
    tempObj, /* Temporary tabber object */
    divs, /* Array of all divs on the page */
    i; /* Loop index */

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

  /* Create a tabber object so we can get the value of classMain */
  tempObj = new tabberObj(tabberArgs);

  /* Find all DIV elements in the document that have class=tabber */

  /* First get an array of all DIV elements and loop through them */
  divs = document.getElementsByTagName("div");
  for (i=0; i < divs.length; i++) {
    
    /* Is this DIV the correct class? */
    if (divs[i].className &&
	divs[i].className.match(tempObj.REclassMain)) {
      
      /* Now tabify the DIV */
      tabberArgs.div = divs[i];
      divs[i].tabber = new tabberObj(tabberArgs);
    }
  }
  
  return this;
}


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


function tabberAutomaticOnLoad(tabberArgs)
{
  /* This function adds tabberAutomatic to the window.onload event,
     so it will run after the document has finished loading.
  */
  var oldOnLoad;

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

  /* Taken from: http://simon.incutio.com/archive/2004/05/26/addLoadEvent */

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


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


/* Run tabberAutomaticOnload() unless the "manualStartup" option was specified */

if (typeof tabberOptions == 'undefined') {

    tabberAutomaticOnLoad();

} else {

  if (!tabberOptions['manualStartup']) {
    tabberAutomaticOnLoad(tabberOptions);
  }

}