;(function($){$.fn.onePageNav=function(options){var opts=$.extend({},$.fn.onePageNav.defaults,options),onePageNav={};onePageNav.sections={};onePageNav.bindNav=function($el,$this,curClass,changeHash,scrollSpeed){var $par=$el.parent(),newLoc=$el.attr('href'),$win=$(window);if(!$par.hasClass(curClass)){onePageNav.adjustNav($this,$par,curClass);$win.unbind('.onePageNav');$.scrollTo(newLoc,scrollSpeed,{onAfter:function(){if(changeHash){window.location.hash=newLoc}$win.bind('scroll.onePageNav',function(){onePageNav.scrollChange($this,curClass)})}})}};onePageNav.adjustNav=function($this,$el,curClass){$this.find('.'+curClass).removeClass(curClass);$el.addClass(curClass)};onePageNav.getPositions=function($this){$this.find('a').each(function(){var linkHref=$(this).attr('href');var divPos=$(linkHref).offset();var topPos=(divPos==null)?0:divPos.top;onePageNav.sections[linkHref.substr(1)]=Math.round(topPos)})};onePageNav.getSection=function(windowPos){var returnValue='',windowHeight=Math.round($(window).height()/2);for(var section in onePageNav.sections){if((onePageNav.sections[section]-windowHeight)<windowPos){returnValue=section}}return returnValue};onePageNav.scrollChange=function($this,curClass){onePageNav.getPositions($this);var windowTop=$(window).scrollTop(),position=onePageNav.getSection(windowTop);if(position!==''){onePageNav.adjustNav($this,$this.find('a[href=#'+position+']').parent(),curClass)}};onePageNav.init=function($this,o){$this.find('a').bind('click',function(e){onePageNav.bindNav($(this),$this,o.currentClass,o.changeHash,o.scrollSpeed);e.preventDefault()});onePageNav.getPositions($this);var didScroll=false;$(window).bind('scroll.onePageNav',function(){didScroll=true});setInterval(function(){if(didScroll){didScroll=false;onePageNav.scrollChange($this,o.currentClass)}},250)};return this.each(function(){var $this=$(this),o=$.meta?$.extend({},opts,$this.data()):opts;onePageNav.init($this,o)})};$.fn.onePageNav.defaults={currentClass:'current',changeHash:false,scrollSpeed:750}})(jQuery);