var create_name = function(text) {
	// Convert text to lower case.
	var name = text.toLowerCase();
	
	// Remove leading and trailing spaces, and any non-alphanumeric
	// characters except for ampersands, spaces and dashes.
	name = name.replace(/^\s+|\s+$|[^a-z0-9&\s-]/g, '');
	
	// Replace '&' with 'and'.
	name = name.replace(/&/g, 'and');
	
	// Replaces spaces with dashes.
	name = name.replace(/\s/g, '-');
	
	// Squash any duplicate dashes.
	name = name.replace(/(-)+\1/g, "$1");
	
	return name;
};

var add_link = function() {
	// Convert the h2 element text into a value that
	// is safe to use in a name attribute.
	var name = create_name($(this).text());
	
	// Create a name attribute in the following div.toggle
	// to act as a fragment anchor.
	$(this).next('div.toggle').attr('name', name);
	
	// Replace the h2.toggle element with a link to the
	// fragment anchor.  Use the h2 text to create the
	// link title attribute.
	$(this).html(
		'<a href="#' + name + '" title="Reveal ' +
		$(this).text() + ' content">' +
		$(this).html() + '</a>');
};

var toggle = function() {
	// Toggle the 'expanded' class of the h2.toggle
	// element, then apply the slideToggle effect
	// to div.toggle siblings.
	$(this).
		toggleClass('expanded').
		nextAll('div.toggle').slideToggle('fast');
};

var remove_focus = function() {
	// Use the blur() method to remove focus.
	$(this).blur();
};

$(document).ready (function (){
	// Replace the '_toggle' class with 'toggle'.
	$('._toggle').
		removeClass('_toggle').
		addClass('toggle');
	
	// Replace the '_expanded' class with 'expanded'. 
	$('._expanded').
		removeClass('_expanded').
		addClass('expanded');
	
	// Hide all div.toggle elements that are not initially expanded.
	$('h2.toggle:not(.expanded)').nextAll('div.toggle').hide();
	
	// Add a link to each h2.toggle element.
	$('h2.toggle').each(add_link);
	
	// Add a click event handler to all h2.toggle elements.
	$('h2.toggle').click(toggle);
	
	// Remove the focus from the link tag when accessed with a mouse.
	$('h2.toggle a').mouseup(remove_focus);
});