statechange.js

$(window).on("statechange", function(event) {
	var state = History.getState();
	var root = History.getRootUrl();

	var uri = state.url.replace(root, "/");

	var $next = $("[data-uri='" + uri + "']");

	if ($next.length) {
		// we've been to this page before.
		var $current = $("#radio-container > .current");

		$current.removeClass("current").hide();
		$next.addClass("current").show();
	} else {
		// we need to fetch it and append it

		$.ajax({
			url: uri,
			type: "GET",
			dataType: "html",
			success: function(data) {
				if (data) {
					var $section = $(data);

					var $current = $("#radio-container > .current");

					$current.removeClass("current").hide();
					$section.appendTo($("#radio-container")).addClass("current").show();

					handlers();

				}
			}
		})
	}

});