$(function () {

    /*******
+    * NAV *
+    *******/

    $("nav a.nav-current-section").click (function () {
        $("nav ul").toggle ();
        return false;
    });
    
    
    /*****************
+    * SMOOTH SCROLL *
+    *****************/
+
+    $('a.navigate-document').click(function () {
+        $('html, body').animate({
+            scrollTop: $( $.attr(this, 'href') ).offset().top
+        }, {
+            duration: 500,
+            easing: 'swing'
+        });
+        return false;
+    });
});

$(function () {

    /*******
+    * NAV *
+    *******/

    $("nav a.nav-current-section").click (function () {
        $("nav ul").toggle ();
        return false;
    });
    
    
    /*****************
     * SMOOTH SCROLL *
     *****************/

    $('a.navigate-document').click(function () {
        $('html, body').animate({
            scrollTop: $( $.attr(this, 'href') ).offset().top
        }, {
            duration: 500,
            easing: 'swing'
        });
        return false;
    });
});

Remove "+"s