$(document).ready( function() {
		// Highlight the currently selected hash location
		$('ul.main_menu a[href=' + window.location.hash  + ']').addClass('selected');

		// Highlight currently active links
		$('ul.main_menu a').click ( function(e) {
			$('ul.main_menu a').removeClass('selected');
			$(this).addClass('selected');
		});

});