Code to delegate every href= on the html to the backbone router.

gistfile1.js

    // All navigation that is relative should be passed through the navigate
    // method, to be processed by the router. If the link has a `data-bypass`
    // attribute, bypass the delegation completely.
    $(document).on("click", "a[href]:not([data-bypass])", function (evt) {
        // Get the absolute anchor href.
        var href = { prop: $(this).prop("href"), attr: $(this).attr("href") };
        // Get the absolute root.
        var root = location.protocol + "//" + location.host + app.root;

        // Ensure the root is part of the anchor href, meaning it's relative.
        if (href.prop.slice(0, root.length) === root) {
            // Stop the default event to ensure the link will not cause a page
            // refresh.
            evt.preventDefault();

            // `Backbone.history.navigate` is sufficient for all Routers and will
            // trigger the correct events. The Router's internal `navigate` method
            // calls this anyways.  The fragment is sliced from the root.
            Backbone.history.navigate(href.attr, true);
        }
    });