$(document).ready(function() {

	// preserve local anchor if specified
	if(location.hash != '') {
		var local_anchor = location.hash.match("[0-9]");
	} else {
		var local_anchor = 0;
	}


	// hide/show detail panels except first or bookmarked one
	$('.details').hide();
	$('.details:eq(' + local_anchor + ')').show();
	$('#side-tabs li:eq(' + local_anchor + ')').addClass('active');


	// add background color when hovering over titles
	$('#side-tabs li:gt(0)').hover(
		function() {
			$(this).addClass('tab-hover');
		},
		function() {
			$(this).removeClass('tab-hover');
		}
	);


	// animate when title or "learn more" link is clicked
	var tablinks = $('#side-tabs a');

	tablinks.click(function() {

		// swap active tab
		$('#side-tabs li').removeClass('active');
		$(this).parent('li').addClass('active');
		
		// swap visible details panel
		$('.details:visible').fadeOut(300);
		var detail_index = tablinks.index(this);
		$('.details:eq(' + detail_index + ')').animate({opacity: 1.0}, 300).fadeIn(300);

		// update location hash for bookmarking
		location.hash = detail_index;
		
		return false;

	});

});