// when the DOM is ready...
$(document).ready(function () {

	if (document.getElementById('slider') != null) {

	    var $panels = $('#slider .scrollContainer > div');
	    var $container = $('#slider .scrollContainer');

	    // if false, we'll float all the panels left and fix the width 
	    // of the container
	    var horizontal = true;

	    // float the panels left if we're going horizontal
	    if (horizontal) {
		   $panels.css({
			  'float' : 'left',
			  'position' : 'relative' // IE fix to ensure overflow is hidden
		   });

		   // calculate a new width for the container (so it holds all panels)
		   $container.css('width', $panels[0].offsetWidth * $panels.length);
	    }

	    // collect the scroll object, at the same time apply the hidden overflow
	    // to remove the default scrollbars that will appear
	    var $scroll = $('#slider .scroll').css('overflow', 'hidden');

	    // apply our left + right buttons
	    $scroll
		   .before('<img class="scrollButtons left" src="images/scroll_left.png" />')
		   .after('<img class="scrollButtons right" src="images/scroll_right.png" />');

	    // handle nav selection
	    function selectNav() {
		   $(this)
			  .parents('ul:first')
				 .find('a')
					.removeClass('selected')
				 .end()
			  .end()
			  .addClass('selected');
	    }

	    $('#slider .navigation').find('a').click(selectNav);

	    // go find the navigation link that has this target and select the nav
	    function trigger(data) {
		   var el = $('#slider .navigation').find('a[href$="' + data.id + '"]').get(0);
		   selectNav.call(el);
	    }

	    if (window.location.hash) {
		   trigger({ id : window.location.hash.substr(1) });
	    } else {
		   $('ul.navigation a:first').click();
	    }

	    // offset is used to move to *exactly* the right place, since I'm using
	    // padding on my example, I need to subtract the amount of padding to
	    // the offset.  Try removing this to get a good idea of the effect
	    var offset = parseInt((horizontal ? 
		   $container.css('paddingTop') : 
		   $container.css('paddingLeft')) 
		   || 0) * -1;


	    var scrollOptions = {
		   target: $scroll, // the element that has the overflow

		   // can be a selector which will be relative to the target
		   items: $panels,

		   navigation: '.navigation a',

		   // selectors are NOT relative to document, i.e. make sure they're unique
		   prev: 'img.left', 
		   next: 'img.right',

		   // allow the scroll effect to run both directions
		   axis: 'xy',

		   onAfter: trigger, // our final callback

		   offset: offset,

		   // duration of the sliding effect
		   duration: 500,

		   // easing - can be used with the easing plugin: 
		   // http://gsgd.co.uk/sandbox/jquery/easing/
		   easing: 'swing'
	    };

	    // apply serialScroll to the slider - we chose this plugin because it 
	    // supports// the indexed next and previous scroll along with hooking 
	    // in to our navigation.
	    $('#slider').serialScroll(scrollOptions);

	    // now apply localScroll to hook any other arbitrary links to trigger 
	    // the effect
	    $.localScroll(scrollOptions);

	    // finally, if the URL has a hash, move the slider in to position, 
	    // setting the duration to 1 because I don't want it to scroll in the
	    // very first page load.  We don't always need this, but it ensures
	    // the positioning is absolutely spot on when the pages loads.
	    scrollOptions.duration = 1;
	    $.localScroll.hash(scrollOptions);
    
    }

});