var SlideDeckAssistant = {
	innerSlideCount: 0,
	/** prevSlide, nextSlide and goToSlide are all custom functions to control progress of the SlideDeck */
	prevSlide: function(theIndex){
		SlideDeckAssistant.goToSlide(theIndex - 1);
	},
	nextSlide: function(theIndex){
		SlideDeckAssistant.goToSlide(theIndex + 1);
	},
	goToSlide: function(theIndex){        
		$('ul.galleryNav li').removeClass('active');
		$('ul.galleryNav li:eq('+ theIndex +')').addClass('active');
		myDeck.goTo(theIndex+1);
		if((theIndex + 1) == SlideDeckAssistant.innerSlideCount){
			// disable the next button
			$('ul.galleryArrows .next').addClass('disabled');
			$('ul.galleryArrows .prev').removeClass('disabled');
		}else if((theIndex + 1) == 1){
			// disable the previous button
			$('ul.galleryArrows .next').removeClass('disabled');
			$('ul.galleryArrows .prev').addClass('disabled');
		}else{
			// enable both next/previous buttons
			$('ul.galleryArrows .next, ul.galleryArrows .prev').removeClass('disabled');
		}
	},
	init: function(){
		SlideDeckAssistant.innerSlideCount = $('#slidedeck_frame dl.slidedeck dd').length;
		/** Store number of slides in SlideDeck */
		$('#slidedeck_frame').append('<ul class="galleryArrows"><li class="prev"><a href="#prev">&larr;<\/a><\/li><li class="next"><a href="#next">&rarr;<\/a><\/li><\/ul>');
		// create navigation element with next and previous buttons
		$('#slidedeck_frame').append('<ul class="galleryNav"><\/ul>');
		// create bullet navigation element
		for (i=0 ; i < SlideDeckAssistant.innerSlideCount ; i++ ) {
			$('ul.galleryNav').append('<li><a href="goto#' + (i+1) + '">' + (i+1) + '<\/a><\/li>');
		}
		// create navigation bullets based on number of slides
		var goToDots = $('ul.galleryNav li a');
		$('ul.galleryNav').css({marginLeft: '-' + (goToDots.outerWidth(true)*goToDots.length / 2) + 'px'});
		// position navigation bullets
		$('ul.galleryNav li:first').addClass('active');
		$('ul.galleryArrows li.prev').addClass('disabled');
		$('ul.galleryNav li a').click(function(e){
			e.preventDefault();
			var theIndex = $('ul.galleryNav li a').index($(this));
			SlideDeckAssistant.goToSlide(theIndex);
			return false;
		});
		// assign click function to navigation bullets
		$('ul.galleryArrows li.prev a').click(function(e){
			e.preventDefault();
			if($(this).parent('li').hasClass('disabled')){
				return false;
			}else{
				var theIndex = $('ul.galleryNav li').index($('ul.galleryNav li.active'));
				SlideDeckAssistant.prevSlide(theIndex);
			}
			return false;
		});
		// assign click function for previous button
		$('ul.galleryArrows li.next a').click(function(e){
			e.preventDefault();
			if($(this).parent('li').hasClass('disabled')){
				return false;
			}
			else{
				var theIndex = $('ul.galleryNav li').index($('ul.galleryNav li.active'));
				SlideDeckAssistant.nextSlide(theIndex);
			}
			return false;
		});
		//assign click function for next button
}
};

$(document).ready(function(){
	SlideDeckAssistant.init();
});