Fix toc link (#6148)

diff --git a/docs/_static/js/sidebar.js b/docs/_static/js/sidebar.js
index 54798b6..73c56d7 100644
--- a/docs/_static/js/sidebar.js
+++ b/docs/_static/js/sidebar.js
@@ -12,8 +12,8 @@
 function render_left_helper(toc, currentText) {
     var lefttoc = toc;
     var currentText = currentText, trailing = ' Documents';
-    if(currentText.endsWith(trailing)) currentText = currentText.substring(0, currentText.length - trailing.length);
-    if(currentText == 'System') currentText = 'Architecture';
+    if (currentText.endsWith(trailing)) currentText = currentText.substring(0, currentText.length - trailing.length);
+    if (currentText == 'System') currentText = 'Architecture';
 
     lefttoc.addClass('current');
     $('.leftsidebar > .sphinxsidebarwrapper').children().remove();
@@ -31,17 +31,25 @@
 /*Render content tree of different pages*/
 function render_lefttoc() {
     var url = window.location.href, indexTrailing = 'index.html';
-    if(url.indexOf(indexTrailing) == -1) {
+    if (url.indexOf(indexTrailing) == -1) {
         for(var i = 0; i < TITLE_WITH_LANG.length; ++i) {
             var path = TITLE_WITH_LANG[i];
-            if(url.indexOf(path) != -1) {
-                $.get('http://' + window.location.host + path + indexTrailing, null, function(data) {
+            if (url.indexOf(path) != -1) {
+                var urlPath = 'http://' + window.location.host + path;
+                $.get(urlPath + indexTrailing, null, function(data) {
                     var currentText = $($.parseHTML(data)).find('.leftsidebar >  .sphinxsidebarwrapper > ul.current > li.current > a').html();
-                    if(isAPI) {
+                    if (isAPI) {
                         render_left_helper($($.parseHTML(data)).find('#table-of-contents > div > ul'), currentText);
                     }
                     else {
                         render_left_helper($($.parseHTML(data)).find('.leftsidebar > .sphinxsidebarwrapper > ul.current > li.current > ul'), currentText);
+                        var tocLink = $('.leftsidebar .sphinxsidebarwrapper .leaf a');
+                        var staticLink = 'http';
+                        tocLink.each(function () {
+                            if (!$(this).attr('href').startsWith(staticLink)) {
+                                $(this).attr('href', urlPath + $(this).attr('href'));
+                            }
+                        });
                     }
                     keepExpand();
                     $('.sphinxsidebar').css("visibility", "visible");
@@ -72,7 +80,7 @@
         $(this).css('color', '#337ab7');
     });
     
-    if(url.indexOf(indexTrailing) != -1 || isAPI) {
+    if (url.indexOf(indexTrailing) != -1 || isAPI) {
         $('.rightsidebar').hide();
     }
 }
@@ -83,10 +91,10 @@
     var links = $('.rightsidebar a');
     for(var i = 1; i < links.length; ++i) {
         var divID = links.eq(i).attr('href');
-        if($(divID).offset().top - $(window).scrollTop() > navbarHeight) {
+        if ($(divID).offset().top - $(window).scrollTop() > navbarHeight) {
             $('.rightsidebar a').css('color', 'black');
             links.eq(i - 1).css('color', '#337ab7');
-            if(!links.eq(i - 1).parent().hasClass('leaf')) {
+            if (!links.eq(i - 1).parent().hasClass('leaf')) {
                 links.eq(i - 1).parent().removeClass('closed');
                 links.eq(i - 1).parent().addClass('opened');
                 links.eq(i - 1).parent().find('ul').first().show();
@@ -100,7 +108,7 @@
 function addToggle(tocClass) {
     var allEntry = $(tocClass + " div.sphinxsidebarwrapper li");
     var subEntry = $(tocClass + " div.sphinxsidebarwrapper").children("ul").first().children("li");
-    if(subEntry.length == 1) {
+    if (subEntry.length == 1) {
         subEntry.prepend("<span class='tocToggle' onclick='toggle(this)'></span>");
         subEntry.addClass('opened');
         allEntry = subEntry.find("li");
@@ -111,7 +119,7 @@
     allEntry.each(function () {
         $(this).prepend("<span class='tocToggle' onclick='toggle(this)'></span>");
         var childUL = $(this).find("ul");
-        if(childUL.length && childUL.first().children().length) {
+        if (childUL.length && childUL.first().children().length) {
             $(this).addClass("closed");
             $(this).find("ul").first().hide();
         }
@@ -125,11 +133,11 @@
 
 /*Sidebar toc toggle button behavior*/
 function toggle(elem) {
-    if($(elem).parent().hasClass("closed")) {
+    if ($(elem).parent().hasClass("closed")) {
         $(elem).parent().find("ul").first().show();
         $(elem).parent().removeClass("closed").addClass("opened");
     }
-    else if($(elem).parent().hasClass("opened")) {
+    else if ($(elem).parent().hasClass("opened")) {
         $(elem).parent().find("ul").first().hide();
         $(elem).parent().removeClass("opened").addClass("closed");
     }
@@ -153,15 +161,15 @@
     var entryList = isAPI ? $('.leftsidebar li') : $('.sphinxsidebar li');
     for(var i = entryList.length - 1; i >= 0; --i) {
         var entryURL = entryList.eq(i).find('a').first().attr('href');
-        if(entryURL != '#' && url.indexOf(entryURL) != -1) {
+        if (entryURL != '#' && url.indexOf(entryURL) != -1) {
             currentEntry = entryList.eq(i);
             break;
         }
     }
     
-    if(isAPI) {
+    if (isAPI) {
         var rootEntry = currentEntry;
-        if(rootEntry.parent().parent().is('li')) rootEntry = rootEntry.parent().parent();
+        if (rootEntry.parent().parent().is('li')) rootEntry = rootEntry.parent().parent();
         rootEntry.children("ul").first().remove();
         rootEntry.append($('.rightsidebar .sphinxsidebarwrapper > ul > li > ul').clone());
         var allEntry = $(".leftsidebar div.sphinxsidebarwrapper li");
@@ -172,7 +180,7 @@
             });
         });
         $('.sphinxsidebar li').each(function () {
-            if(url.endsWith($(this).find('a').first().attr('href'))) {
+            if (url.endsWith($(this).find('a').first().attr('href'))) {
                 currentEntry = $(this);
                 return false;
             }
@@ -184,7 +192,7 @@
     }
     currentEntry.find('a').first().css('color', '#337ab7');
     currentEntry.children("ul").first().show();
-    if(!currentEntry.hasClass('leaf')) currentEntry.removeClass("closed").addClass("opened");
+    if (!currentEntry.hasClass('leaf')) currentEntry.removeClass("closed").addClass("opened");
     while(currentEntry.parent().is('ul') && currentEntry.parent().parent().is('li')) {
         currentEntry = currentEntry.parent().parent();
         currentEntry.removeClass("closed").addClass("opened");
@@ -195,15 +203,15 @@
 
 $(document).ready(function () {
     var url = window.location.href, searchFlag = 'search.html';
-    if(url.indexOf(searchFlag) == -1) {
+    if (url.indexOf(searchFlag) == -1) {
         for(var i = 0; i < API_PAGE.length; ++i) {
-            if(url.indexOf('/api/' + API_PAGE[i]) != -1) {
+            if (url.indexOf('/api/' + API_PAGE[i]) != -1) {
                 isAPI = true;
                 break;
             }
         }
         render_righttoc();
-        if($('.leftsidebar').length) render_lefttoc();
+        if ($('.leftsidebar').length) render_lefttoc();
     }
     $(window).scroll(function () {
         scroll_righttoc();