add old doc example links
diff --git a/_jade/en/index.jade b/_jade/en/index.jade
index c17c0b9..cdb651d 100644
--- a/_jade/en/index.jade
+++ b/_jade/en/index.jade
@@ -20,10 +20,10 @@
                         .home-brand Apache ECharts
                         .home-subtitle An Open Source JavaScript Visualiztion Library
                         .home-btn-panel
-                            a.btn.btn-main.btn-index-home(href='./tutorial.html#5%20分钟上手%20ECharts')
+                            a.btn.btn-main.btn-index-home(href='#{host}/tutorial.html#5%20分钟上手%20ECharts')
                                 include ../components/svg/index-learn
                                 span Get Started
-                            a.btn.btn-main.btn-index-home(href='#{hostParam}/examples/zh/index.html')
+                            a.btn.btn-main.btn-index-home(href='#{host}/examples/zh/index.html')
                                 include ../components/svg/index-example
                                 span Demo
                             a.btn.btn-main.btn-index-home.btn-index-github(href='https://github.com/apache/incubator-echarts', target='_blank')
@@ -36,7 +36,7 @@
                     .index-features
                         h2.reveal Features
                         hr.reveal
-                        a.more.reveal(href='#') View More
+                        a.more.reveal(href='#{host}/feature.html') View More
                     .row
                         .col-md-6
                             .index-feature#index-feature-1
diff --git a/_jade/layouts/doc.jade b/_jade/layouts/doc.jade
index 737e0c2..93a2fcc 100644
--- a/_jade/layouts/doc.jade
+++ b/_jade/layouts/doc.jade
@@ -23,6 +23,16 @@
 
         #ec-doc-main
 
+        #v4-link.alert.alert-info.alert-dismissible
+            if ecWWWLang == 'en'
+                a(href="#{host}/v4/option.html") V4 Documentation
+            else
+                a(href="#{host}/v4/option.html") 旧版本文档
+
+            button.close(type="button", data-dismiss="alert", aria-label="Close")
+                span(aria-hidden="true") ×
+
+
 block extra_js
     script(src="#{cdnThirdParty.vueJS}")
     script(src="#{cdnThirdParty.elementUIJS}")
diff --git a/_jade/layouts/example.jade b/_jade/layouts/example.jade
index 59bf03d..a42c1ee 100644
--- a/_jade/layouts/example.jade
+++ b/_jade/layouts/example.jade
@@ -23,6 +23,16 @@
 
         #ec-example-main
 
+        #v4-link.alert.alert-info.alert-dismissible
+            if ecWWWLang == 'en'
+                a(href="#{host}/v4/examples/") V4 Examples
+            else
+                a(href="#{host}/v4/examples/") 旧版本示例
+
+            button.close(type="button", data-dismiss="alert", aria-label="Close")
+                span(aria-hidden="true") ×
+
+
 block extra_js
     script(src="#{cdnThirdParty.vueJS}")
     script(src="#{cdnThirdParty.elementUIJS}")
diff --git a/_jade/zh/index.jade b/_jade/zh/index.jade
index 7fa31b7..853e7e8 100644
--- a/_jade/zh/index.jade
+++ b/_jade/zh/index.jade
@@ -19,10 +19,10 @@
                         .home-brand Apache ECharts
                         .home-subtitle 一个基于 JavaScript 的开源可视化图表库
                         .home-btn-panel
-                            a.btn.btn-main.btn-index-home(href='./tutorial.html#5%20分钟上手%20ECharts')
+                            a.btn.btn-main.btn-index-home(href='#{host}/tutorial.html#5%20分钟上手%20ECharts')
                                 include ../components/svg/index-learn
                                 span 快速入门
-                            a.btn.btn-main.btn-index-home(href='#{hostParam}/examples/zh/index.html')
+                            a.btn.btn-main.btn-index-home(href='#{host}/examples/zh/index.html')
                                 include ../components/svg/index-example
                                 span 所有示例
                             a.btn.btn-main.btn-index-home.btn-index-github(href='https://github.com/apache/incubator-echarts', target='_blank')
@@ -44,7 +44,7 @@
                     .index-features
                         h2.reveal 特性
                         hr.reveal
-                        a.more.reveal(href='#') 查看完整特性
+                        a.more.reveal(href='#{host}/feature.html') 查看完整特性
                     .row
                         .col-md-6
                             .index-feature#index-feature-1
diff --git a/_scss/main.scss b/_scss/main.scss
index 2647a2e..8e14125 100644
--- a/_scss/main.scss
+++ b/_scss/main.scss
@@ -72,6 +72,17 @@
     }
 }
 
+#v4-link {
+    position: fixed;
+    bottom: 0;
+    left: 50%;
+    width: 200px;
+    margin-left: -100px;
+    text-align: center;
+    z-index: 1000;
+    padding: 5px 30px;
+}
+
 // settings contains declaration of variables only
 @import 'settings.colors';