$slideshow = {
	context: false,
	tabs: false,
	
	init: function() {
		// set the context to help speed up selectors/improve performance
		this.context = jQuery('#slideshow');
		
		// set tabs to current hard coded navigation items
		this.tabs = jQuery('ul.slides-nav li', this.context);
		
		// remove hard coded navigation items from DOM 
		// because they aren't hooked up to jQuery cycle
		this.tabs.remove();
		
		// prepare slideshow and jQuery cycle tabs
		this.prepareSlideshow();
	},
	
	prepareSlideshow: function() {
		// initialise the jquery cycle plugin -
		// for information on the options set below go to: 
		// http://malsup.com/jquery/cycle/options.html
		jQuery('div.slides > ul', $slideshow.context).cycle({
			fx: 'fade',
			timeout: 4000,	  // time before next slide appears (in ms)
			speed: 1000,   // time it takes to slide in each slide (in ms)
			fastOnEvent: 300,	  // time it takes to slide in each slide (in ms) when clicking through tabs
			pauseOnPagerHover: true,
			pause: true,
			pager: jQuery('ul.slides-nav', $slideshow.context),
			pagerAnchorBuilder: $slideshow.pagerAnchorBuilder, //prepareTabs
			before: $slideshow.before, //activateTab
			pagerClick: $slideshow.pagerClick
		});
	},
	
	//prepareTabs
	pagerAnchorBuilder: function(i, slide) {
		// return markup from hardcoded tabs for use as jQuery cycle tabs
		// (attaches necessary jQuery cycle events to tabs)
		return $slideshow.tabs.eq(i);
	},
	
	//activateTab
	before: function(currentSlide, nextSlide) {
		// get the active tab
		var activeTab = jQuery('a[href="#' + nextSlide.id + '"]', $slideshow.context);
		
		// if there is an active tab
		if(activeTab.length) {
			// remove active styling from all other tabs
			$slideshow.tabs.removeClass('on');
			
			// add active styling to active button
			activeTab.parent().addClass('on');
		}
	},
};

jQuery("document").ready(function(){

  	// add a 'js' class to the body
	jQuery("document").addClass('js');
	
	// initialise the slideshow when the DOM is ready
	$slideshow.init();


});