--- doc/tmpl/js/crd.js	2017/06/02 11:59:21	3269
+++ doc/tmpl/js/crd.js	2017/06/02 18:31:00	3270
@@ -6,6 +6,12 @@
 
 var g_isTouch = false;
 
+function crdWindowWidth() {
+    return window.innerWidth ||
+           document.documentElement.clientWidth ||
+           document.getElementsByTagName('body')[0].clientWidth;
+}
+
 function crdWindowHeight() {
     return window.innerHeight ||
            document.documentElement.clientHeight ||
@@ -55,6 +61,21 @@
     }
 }
 
+function crdUpdateTOCStatus() {
+    var noTOC = $("html").hasClass("no-toc");
+    $("nav > .foldbtn a").html(
+        noTOC ? ">>>" : "<<<"
+    );
+    $("nav > .foldbtn a").attr("title",
+        noTOC ? "Show content menu." : "Hide content menu."
+    )
+}
+
+function crdToggleTOC() {
+    $("html").toggleClass("no-toc");
+    crdUpdateTOCStatus();
+}
+
 function crdOnWindowResize() {
     var wh = crdWindowHeight();
     $("nav > ul > li ul").css("max-height", wh - 70);
@@ -84,6 +105,9 @@
         $("header a[title]" ).tooltip({
             disabled: true
         });
+        $("nav a[title]" ).tooltip({
+            disabled: true
+        });
     }
     $("article img[caption]").each(function() {
         $(this).after(
@@ -114,6 +138,11 @@
             });
         }
     });
+    var w = crdWindowWidth();
+    if (w < 1200) {
+        $("html").addClass("no-toc");
+    }
+    crdUpdateTOCStatus();
 });
 
 $(document).ready(function() {