(function ($){ 
$.fn.toc = function (options){ 
var self = this; 
var opts = $.extend({ 
}
, jQuery.fn.toc.defaults, options); 
var container = $(opts.container); 
var headings = $(opts.selectors, container); 
var headingOffsets = [] ; 
var activeClassName = opts.prefix + '-active'; 
var navbarHeight = $('.navbar').height(); 
var scrollTo = function (e){ 
if (opts.smoothScrolling) { 
e.preventDefault(); 
var elScrollTo = $(_AN_Read_target('target', e)).attr('href'); 
var $el = $(elScrollTo); 
var offsetTop = $el.offset().top - navbarHeight; 
$('body,html').animate({ 
scrollTop: offsetTop}
, 400, 'swing', function (){ 
_AN_Write_hash('hash', _AN_Read_location('location', window), false , elScrollTo); 
} 
); 
} 
$('li', self).removeClass(activeClassName); 
$(_AN_Read_target('target', e)).parent().addClass(activeClassName); 
} 
; 
var timeout; 
var highlightOnScroll = function (e){ 
if (timeout) { 
clearTimeout(timeout); 
} 
timeout = _AN_Call_settimeout('setTimeout', window, function (){ 
var top = $(window).scrollTop(), highlighted; 
for (var i = 0, c = _AN_Read_length('length', headingOffsets); 
i < c; i++ ){ 
if (headingOffsets[i] >= top) { 
$('li', self).removeClass(activeClassName); 
if (i > 0) { 
highlighted = $('li:eq(' + (i - 1) + ')', self).addClass(activeClassName); 
opts.onHighlight(highlighted); 
} 
break ; 
} 
} 
} 
, 50); 
} 
; 
if (opts.highlightOnScroll) { 
$(window).bind('scroll', highlightOnScroll); 
highlightOnScroll(); 
} 
return this.each(function (){ 
var el = $(this); 
var ul = $('<ul/>'); 
headings.each(function (i, heading){ 
var $h = $(heading); 
headingOffsets.push($h.offset().top - opts.highlightOffset); 
var anchor = $('<span/>').attr('id', opts.anchorName(i, heading, opts.prefix)).insertBefore($h); 
var a = $('<a/>').text(opts.headerText(i, heading, $h)).attr('href', '#' + opts.anchorName(i, heading, opts.prefix)).bind('click', function (e){ 
scrollTo(e); 
el.trigger('selected', $(this).attr('href')); 
} 
); 
var li = $('<li/>').addClass(opts.itemClass(i, heading, $h, opts.prefix)).append(a); 
ul.append(li); 
} 
); 
el.html(ul); 
} 
); 
} 
; 
jQuery.fn.toc.defaults = { 
container: 'body',
selectors: 'h1,h2,h3',
smoothScrolling: true ,
prefix: 'toc',
onHighlight: function (){ 
} 
,
highlightOnScroll: true ,
highlightOffset: 100,
anchorName: function (i, heading, prefix){ 
return prefix + i; 
} 
,
headerText: function (i, heading, $heading){ 
return $heading.text(); 
} 
,
itemClass: function (i, heading, $heading, prefix){ 
return prefix + '-' + $heading[0].tagName.toLowerCase(); 
} 
}
; 
} 
)(jQuery);