(function($) {
jQuery.fn.slidertron = function(options) {
var settings = jQuery.extend({
selectorParent:		jQuery(this)
}, options);
return jQuery.slidertron(settings);
}
jQuery.slidertron = function(options) {
var settings = jQuery.extend({		
selectorParent:	null,
viewerSelector:null,
slidesSelector:null,
navNextSelector:			null,
navPreviousSelector:			null,
navFirstSelector:			null,
navLastSelector:			null,
navStopAdvanceSelector:			null,
navPlayAdvanceSelector:			null,
speed:	'fast',
navWrap:true,
seamlessWrap:true,
advanceDelay:0,
advanceResume:0,
advanceNavActiveClass:			'active'
}, options);
var isConfigured = true,
isLocked = false,
isAdvancing = false,
isSeamless = false,
list = new Array(),
currentIndex = false,
timeoutID;
var __slides,
__viewer,
__navFirst,
__navLast,
__navNext,
__navPrevious,
__navStopAdvance,
__navPlayAdvance;
function getElement(selector, required)
{
var x;
try
{
if (selector == null)
throw 'is undefined';		
if (settings.selectorParent)
x = settings.selectorParent.find(selector);
else
x = jQuery(selector);
if (x.length == 0)
throw 'does not exist';
return x;
}
catch (error)
{
if (required == true)
{
alert('Error: Required selector "' + selector + '" ' + error + '.');
isConfigured = false;
}
}
return null;
}
function advance()
{
if (settings.advanceDelay == 0)
	return;	
if (!isLocked)
	nextSlide();
timeoutID = window.setTimeout(advance, settings.advanceDelay);
}
function initializeAdvance()
{
if (settings.advanceDelay == 0)
	return;
if (__navPlayAdvance)
	__navPlayAdvance.addClass(settings.advanceNavActiveClass);
if (__navStopAdvance)
	__navStopAdvance.removeClass(settings.advanceNavActiveClass);
isAdvancing = true;
timeoutID = window.setTimeout(advance, settings.advanceDelay);
}
function interruptAdvance()
{
if (!isAdvancing)
	return;
if (settings.advanceDelay == 0)
	return;
window.clearTimeout(timeoutID);
if (settings.advanceResume == 0)
	return;
timeoutID = window.setTimeout(advance, settings.advanceResume);
}	
function stopAdvance()
{
if (settings.advanceDelay == 0)
	return;
if (!isAdvancing)
	return;
isAdvancing = false;
window.clearTimeout(timeoutID);
}	
function playAdvance(skip)
{
if (settings.advanceDelay == 0)
	return;
if (isAdvancing)
	return;
isAdvancing = true;
if (skip)
timeoutID = window.setTimeout(advance, settings.advanceDelay);
else
advance();
}	
function firstSlide()
{
switchSlide((isSeamless ? 1 : 0));
}
function lastSlide()
{
switchSlide((isSeamless ? list.length - 2 : list.length - 1));
}
function nextSlide()
{
if (currentIndex < list.length - 1)
	switchSlide(currentIndex + 1);
else if (settings.navWrap || isAdvancing)
	switchSlide(0);
}
function previousSlide()
{
if (currentIndex > 0)
	switchSlide(currentIndex - 1);
else if (settings.navWrap)
	switchSlide(list.length - 1);
}
function switchSlide(index)
{
if (isLocked)
return false;
isLocked = true;
if (currentIndex === false)
{
currentIndex = index;
__reel.css('left', -1 * list[currentIndex].x);
isLocked = false;
}
else
{
var diff, currentX, newX;	
currentX = list[currentIndex].x;
newX = list[index].x;
diff = currentX - newX;
__reel.animate({ left: '+=' + diff }, settings.speed, 'swing', function() {
currentIndex = index;
if (list[currentIndex].realIndex !== false)
{
currentIndex = list[currentIndex].realIndex;
__reel.css('left', -1 * list[currentIndex].x);
}
isLocked = false;
});
}
}
function initialize()
{
__viewer = getElement(settings.viewerSelector, true);
__reel = getElement(settings.reelSelector, true);
__slides = getElement(settings.slidesSelector, true);
__navFirst = getElement(settings.navFirstSelector);
__navLast = getElement(settings.navLastSelector);
__navNext = getElement(settings.navNextSelector);
__navPrevious = getElement(settings.navPreviousSelector);
__navStopAdvance = getElement(settings.navStopAdvanceSelector);
__navPlayAdvance = getElement(settings.navPlayAdvanceSelector);
if (isConfigured == false)
{
alert('Error: One or more configuration errors detected. Aborting.');
return;
}
__viewer.css('position', 'relative');
__viewer.css('overflow', 'hidden');
__reel.css('position', 'absolute');
__reel.css('left', 0);
__reel.css('top', 0);
var cx = 0, length = __slides.length;
if (length > 2 && settings.seamlessWrap)
{
isSeamless = true;
var first = __slides.first();
var last = __slides.last();
last.clone().insertBefore(first);
first.clone().insertAfter(last);
__slides = getElement(settings.slidesSelector, true);
}
__slides.each(function(index) {
var y = jQuery(this);
list[index] = {
object:		y,
x:			cx,
realIndex:	false
};			
y.css('position', 'absolute');
y.css('left', cx);
y.css('top', 0);			
cx += y.width();
});
if (isSeamless)
{
list[0].realIndex = length; // second to last
list[length + 1].realIndex = 1; // second
}
if (__navFirst)
__navFirst.click(function(event) {
event.preventDefault();
if (isLocked)
	return false;
if (isAdvancing)
	interruptAdvance();
firstSlide();
});
if (__navLast)
__navLast.click(function(event) {
event.preventDefault();
if (isLocked)
	return false;
if (isAdvancing)
	interruptAdvance();
lastSlide();
});
if (__navNext)
__navNext.click(function(event) {
event.preventDefault();
if (isLocked)
	return false;
if (isAdvancing)
	interruptAdvance();
nextSlide();
});
if (__navPrevious)
__navPrevious.click(function(event) {
event.preventDefault();
if (isLocked)
	return false;
if (isAdvancing)
interruptAdvance();
previousSlide();
});
if (__navStopAdvance)
__navStopAdvance.click(function(event) {
event.preventDefault();
if (isLocked)
	return false;
if (!isAdvancing)
	return false;
__navStopAdvance.addClass(settings.advanceNavActiveClass);
if (__navPlayAdvance)
	__navPlayAdvance.removeClass(settings.advanceNavActiveClass);
stopAdvance();
});
if (__navPlayAdvance)
__navPlayAdvance.click(function(event) {
event.preventDefault();
if (isLocked)
return false;
if (isAdvancing)
return false;
__navPlayAdvance.addClass(settings.advanceNavActiveClass);
if (__navStopAdvance)
__navStopAdvance.removeClass(settings.advanceNavActiveClass);
playAdvance();
});
}
jQuery().ready(function() {
initialize();
initializeAdvance();
firstSlide();
});
};
})(jQuery);