diff --git a/pages/post/_id.vue b/pages/post/_id.vue
index 56eaff2..a9b5140 100644
--- a/pages/post/_id.vue
+++ b/pages/post/_id.vue
@@ -1327,7 +1327,7 @@ modal
     background-color #000
     padding 10px
     box-shadow 0 0 8px #000
-    z-index 999
+    z-index 99999
     padding-bottom 20px
     min-width 240px
     max-width 300px
diff --git a/plugins/browser.js b/plugins/browser.js
index 4a37ceb..8e9ab97 100644
--- a/plugins/browser.js
+++ b/plugins/browser.js
@@ -2,11 +2,11 @@ import '~/layouts/common.styl'
 import vditor from 'vditor'
 import 'vditor/dist/index.css'
 
-// const $tags = document.getElementById('tags')
-// let floatTop = null
-// if ($tags) {
-//   floatTop = $tags.offsetTop + $tags.scrollHeight + 30
-// }
+const $tags = document.getElementById('tags')
+let floatTop = null
+if ($tags) {
+  floatTop = $tags.offsetTop + $tags.scrollHeight + 30
+}
 
 function addEvent (obj, type, fn) {
   if (obj.attachEvent) {
@@ -25,35 +25,35 @@ window.onload = function () {
     alert('您的浏览器版本过低，继续访问将会出现问题，请升级浏览器版本！') // eslint-disable-line
   }
 
-  // // 底部返回顶部按钮
-  // const top = document.getElementById('gotop')
-  // if (top) {
-  //   // 滚动一屏幕时显示回到顶部
-  //   addEvent(window, 'scroll', function () {
-  //     const currentPosition = document.documentElement.scrollTop || document.body.scrollTop
-  //     currentPosition > window.screen.availHeight ? top.style.display = 'block' : top.style.display = 'none'
+  // 底部返回顶部按钮
+  const top = document.getElementById('gotop')
+  if (top) {
+    // 滚动一屏幕时显示回到顶部
+    addEvent(window, 'scroll', function () {
+      const currentPosition = document.documentElement.scrollTop || document.body.scrollTop
+      currentPosition > window.screen.availHeight ? top.style.display = 'block' : top.style.display = 'none'
 
-  //     // 左部导航自动浮动
-  //     if (currentPosition > floatTop && document.body.clientWidth > 768) {
-  //       document.getElementById('navication').style.position = 'fixed'
-  //     } else {
-  //       document.getElementById('navication').style.position = 'static'
-  //     }
-  //   })
+      // 左部导航自动浮动
+      if (currentPosition > floatTop && document.body.clientWidth > 768) {
+        document.getElementById('navication').style.position = 'fixed'
+      } else {
+        document.getElementById('navication').style.position = 'static'
+      }
+    })
 
-  //   top.onclick = function () {
-  //     var timer = setInterval(function () { // eslint-disable-line
-  //       let currentPosition = document.documentElement.scrollTop || document.body.scrollTop
-  //       currentPosition -= 100
-  //       if (currentPosition > 0) {
-  //         window.scrollTo(0, currentPosition)
-  //       } else {
-  //         window.scrollTo(0, 0)
-  //         clearInterval(timer)
-  //       }
-  //     }, 10)
-  //   }
-  // }
+    top.onclick = function () {
+      var timer = setInterval(function () { // eslint-disable-line
+        let currentPosition = document.documentElement.scrollTop || document.body.scrollTop
+        currentPosition -= 100
+        if (currentPosition > 0) {
+          window.scrollTo(0, currentPosition)
+        } else {
+          window.scrollTo(0, 0)
+          clearInterval(timer)
+        }
+      }, 10)
+    }
+  }
 
   let _hmt = _hmt || [] // eslint-disable-line
   const hm = document.createElement('script')