(function(){var container,button,menu,links,subMenus,i,len;container=document.getElementById('site-navigation');if(!container){return;}
button=container.getElementsByTagName('button')[0];if('undefined'===typeof button){return;}
menu=container.getElementsByTagName('ul')[0];if('undefined'===typeof menu){button.style.display='none';return;}
menu.setAttribute('aria-expanded','false');if(-1===menu.className.indexOf('nav-menu')){menu.className+=' nav-menu';}
button.onclick=function(){if(-1!==container.className.indexOf('toggled')){container.className=container.className.replace(' toggled','');button.setAttribute('aria-expanded','false');menu.setAttribute('aria-expanded','false');}else{container.className+=' toggled';button.setAttribute('aria-expanded','true');menu.setAttribute('aria-expanded','true');}};links=menu.getElementsByTagName('a');subMenus=menu.getElementsByTagName('ul');for(i=0,len=subMenus.length;i<len;i++){subMenus[i].parentNode.setAttribute('aria-haspopup','true');}
for(i=0,len=links.length;i<len;i++){links[i].addEventListener('focus',toggleFocus,true);links[i].addEventListener('blur',toggleFocus,true);}
function toggleFocus(){var self=this;while(-1===self.className.indexOf('nav-menu')){if('li'===self.tagName.toLowerCase()){if(-1!==self.className.indexOf('focus')){self.className=self.className.replace(' focus','');}else{self.className+=' focus';}}
self=self.parentElement;}}})();