//Top Navigation, adding .active class to a tab upon navigation

nav.js

	//Top Navigation, adding .active class to a tab upon navigation
	$(function(){
		//deactivate default click action in # <a> links in navbar 
	    $('.nav [href^=#]').click(function (e) {
			e.preventDefault()
		});
		
		var url = window.location.pathname,
		// create regexp to match current url pathname and remove trailing slash if 
		//present as it could collide with the link in navigation in case trailing slash wasn't present there
			urlRegExp = new RegExp(url.replace(/\/$/,'') + "$");
		// now grab every link from the navigation
		$('.nav a').each(function(){
			// and test its normalized href against the url pathname regexp
			if(urlRegExp.test(this.href.replace(/\/$/,''))){
				//if($(this).parents().hasClass('mainnav')) {
					//$(this).parents().filter('.mainnav').addClass('active');
					$(this).parents('.mainnav').addClass('active');
				//}
			}
		});
	});