gistfile1.js

$( 'a[href*=#]:not([href=#])' ).on( 'click', function() {
	if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
		var target = $(this.hash);
		target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
		if (target.length) {
			$('html,body').animate({
			scrollTop: target.offset().top
		}, 500);
			return false;
		}
	}
} );