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diff --git a/files/zh-cn/web/api/element/nextelementsibling/index.html b/files/zh-cn/web/api/element/nextelementsibling/index.html
new file mode 100644
index 0000000000..a39fd29558
--- /dev/null
+++ b/files/zh-cn/web/api/element/nextelementsibling/index.html
@@ -0,0 +1,167 @@
+---
+title: NonDocumentTypeChildNode.nextElementSibling
+slug: Web/API/NonDocumentTypeChildNode/nextElementSibling
+translation_of: Web/API/NonDocumentTypeChildNode/nextElementSibling
+---
+<p>{{ gecko_minversion_header("1.9.1") }}</p>
+
+<p>{{ ApiRef() }}</p>
+
+<h2 id="Summary" name="Summary">概述</h2>
+
+<p><strong><span style="font-family: Verdana,Tahoma,sans-serif;">nextElementSibling</span></strong> 返回当前元素在其父元素的子元素节点中的后一个元素节点,如果该元素已经是最后一个元素节点,则返回<code>null,</code>该属性是只读的.</p>
+
+<h2 id="Syntax_and_values" name="Syntax_and_values">语法</h2>
+
+<pre class="eval">var <em>nextNode</em> = elementNodeReference.nextElementSibling;
+</pre>
+
+<h2 id="Example" name="Example">例子</h2>
+
+<pre>&lt;div id="div-01"&gt;Here is div-01&lt;/div&gt;
+&lt;div id="div-02"&gt;Here is div-02&lt;/div&gt;
+
+&lt;script type="text/javascript"&gt;
+  var el = document.getElementById('div-01').nextElementSibling;
+  document.write('&lt;p&gt;Siblings of div-01&lt;/p&gt;&lt;ol&gt;');
+  while (el) {
+    document.write('&lt;li&gt;' + el.nodeName + '&lt;/li&gt;');
+    el = el.nextElementSibling;
+  }
+  document.write('&lt;/ol&gt;');
+&lt;/script&gt;
+</pre>
+
+<p>上面的例子会输出以下内容:</p>
+
+<pre>Siblings of div-01
+
+   1. DIV
+   2. SCRIPT
+   3. P
+   4. OL</pre>
+
+<h3 id="Specification" name="Specification" style="line-height: 30px; font-size: 2.14285714285714rem;"> </h3>
+
+<h2 id="Internet_Explorer_8_支持补丁">Internet Explorer 8 支持补丁</h2>
+
+<p>该属性不支持IE9之前的版本, 下面的代码片段可以增进对IE8的支持:</p>
+
+<pre><code>// Source: https://github.com/Alhadis/Snippets/blob/master/js/polyfills/IE8-child-elements.js
+if(!("nextElementSibling" in document.documentElement)){
+    Object.defineProperty(Element.prototype, "nextElementSibling", {
+        get: function(){
+            var e = this.nextSibling;
+            while(e &amp;&amp; 1 !== e.nodeType)
+                e = e.nextSibling;
+            return e;
+        }
+    });
+}</code>
+</pre>
+
+<h2 id="Internet_Explorer_9_和_Safari支持补丁">Internet Explorer 9+ 和 Safari支持补丁</h2>
+
+<pre><code>// Source: https://github.com/jserz/js_piece/blob/master/DOM/NonDocumentTypeChildNode/nextElementSibling/nextElementSibling.md
+(function (arr) {
+  arr.forEach(function (item) {
+    if (item.hasOwnProperty('nextElementSibling')) {
+      return;
+    }
+    Object.defineProperty(item, 'nextElementSibling', {
+      configurable: true,
+      enumerable: true,
+      get: function () {
+        var el = this;
+        while (el = el.nextSibling) {
+          if (el.nodeType === 1) {
+              return el;
+          }
+        }
+        return null;
+      },
+      set: undefined
+    });
+  });
+})([Element.prototype, CharacterData.prototype]);</code></pre>
+
+<h2 id="Specification" name="Specification" style="line-height: 30px; font-size: 2.14286rem;">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th style="line-height: 16px;">Feature</th>
+   <th style="line-height: 16px;">Chrome</th>
+   <th style="line-height: 16px;">Firefox (Gecko)</th>
+   <th style="line-height: 16px;">Internet Explorer</th>
+   <th style="line-height: 16px;">Opera</th>
+   <th style="line-height: 16px;">Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support (on {{domxref("Element")}})</td>
+   <td>4</td>
+   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
+   <td>9</td>
+   <td>9.8</td>
+   <td>4</td>
+  </tr>
+  <tr>
+   <td>Support on {{domxref("CharacterData")}}</td>
+   <td>29.0</td>
+   <td>{{CompatGeckoDesktop("25")}} [1]</td>
+   <td>{{CompatNo}}</td>
+   <td>16.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th style="line-height: 16px;">Feature</th>
+   <th style="line-height: 16px;">Android</th>
+   <th style="line-height: 16px;">Firefox Mobile (Gecko)</th>
+   <th style="line-height: 16px;">IE Mobile</th>
+   <th style="line-height: 16px;">Opera Mobile</th>
+   <th style="line-height: 16px;">Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support (on {{domxref("Element")}})</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.9.1")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>9.8</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+  <tr>
+   <td>Support on {{domxref("CharacterData")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>16.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h3 id="sect1"> </h3>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li><code><a href="/zh-cn/DOM/Node.nextSibling" title="zh-cn/DOM/Element.nextSibling">nextSibling</a></code></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.childElementCount" title="zh-cn/DOM/Element.childElementCount"><code>childElementCount</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.children" title="zh-cn/DOM/Element.children"><code>children</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.firstElementChild" title="zh-cn/DOM/Element.firstElementChild"><code>firstElementChild</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.lastElementChild" title="zh-cn/DOM/Element.lastElementChild"><code>lastElementChild</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.previousElementSibling" title="zh-cn/DOM/Element.previousElementSibling"><code>previousElementSibling</code></a></li>
+</ul>
+
+<p>{{ languages( {"en": "en/DOM/element.nextElementSibling" } ) }}</p>
diff --git a/files/zh-cn/web/api/element/previouselementsibling/index.html b/files/zh-cn/web/api/element/previouselementsibling/index.html
new file mode 100644
index 0000000000..8c78a68adf
--- /dev/null
+++ b/files/zh-cn/web/api/element/previouselementsibling/index.html
@@ -0,0 +1,118 @@
+---
+title: NonDocumentTypeChildNode.previousElementSibling
+slug: Web/API/NonDocumentTypeChildNode/previousElementSibling
+translation_of: Web/API/NonDocumentTypeChildNode/previousElementSibling
+---
+<p>{{ ApiRef() }}</p>
+
+<h3 id="Summary" name="Summary">概述</h3>
+
+<p><strong>previousElementSibling</strong> 返回当前元素在其父元素的子元素节点中的前一个元素节点,如果该元素已经是第一个元素节点,则返回<code>null,</code>该属性是只读的.</p>
+
+<h3 id="Syntax_and_values" name="Syntax_and_values">语法</h3>
+
+<pre class="eval">var <em>prevNode</em> = elementNodeReference.previousElementSibling;
+</pre>
+
+<h3 id="Example" name="Example">例子</h3>
+
+<pre class="brush: html">&lt;div id="div-01"&gt;Here is div-01&lt;/div&gt;
+&lt;div id="div-02"&gt;Here is div-02&lt;/div&gt;
+&lt;li&gt;This is a list item&lt;/li&gt;
+&lt;li&gt;This is another list item&lt;/li&gt;
+&lt;div id="div-03"&gt;Here is div-03&lt;/div&gt;
+
+&lt;script type="text/javascript"&gt;
+  var el = document.getElementById('div-03').previousElementSibling;
+  document.write('&lt;p&gt;Siblings of div-03&lt;/p&gt;&lt;ol&gt;');
+  while (el) {
+    document.write('&lt;li&gt;' + el.nodeName + '&lt;/li&gt;');
+    el = el.previousElementSibling;
+  }
+  document.write('&lt;/ol&gt;');
+&lt;/script&gt;
+</pre>
+
+<p>上面的例子会输出以下内容:</p>
+
+<pre>Siblings of div-03
+
+   1. LI
+   2. LI
+   3. DIV
+   4. DIV
+</pre>
+
+<h3 id="Specification" name="Specification">浏览器兼容性</h3>
+
+<p>{{ CompatibilityTable() }}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>4</td>
+   <td>{{ CompatGeckoDesktop("1.9.1") }}</td>
+   <td>9</td>
+   <td>9.8</td>
+   <td>4</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table" style="font-family: 'Open Sans Light', Helvetica, Arial, sans-serif; font-size: 16px; line-height: 16px;">
+ <tbody>
+  <tr>
+   <th style="line-height: 16px;">Feature</th>
+   <th style="line-height: 16px;">Android</th>
+   <th style="line-height: 16px;">Firefox Mobile (Gecko)</th>
+   <th style="line-height: 16px;">IE Mobile</th>
+   <th style="line-height: 16px;">Opera Mobile</th>
+   <th style="line-height: 16px;">Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support (on {{domxref("Element")}})</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("1.9.1")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>9.8</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+  <tr>
+   <td>Support on {{domxref("CharacterData")}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("25")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>16.0</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h3 id="Specification" name="Specification">规范</h3>
+
+<p><a class="external" href="http://www.w3.org/TR/2008/REC-ElementTraversal-20081222/#attribute-previousElementSibling">Element Traversal Specification: previousElementSibling</a></p>
+
+<h3 id="相关链接">相关链接</h3>
+
+<ul>
+ <li><a class="internal" href="/zh-cn/DOM/Element.childElementCount" title="zh-cn/DOM/Element.childElementCount"><code>childElementCount</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.children" title="zh-cn/DOM/Element.children"><code>children</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.firstElementChild" title="zh-cn/DOM/Element.firstElementChild"><code>firstElementChild</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.lastElementChild" title="zh-cn/DOM/Element.lastElementChild"><code>lastElementChild</code></a></li>
+ <li><a class="internal" href="/zh-cn/DOM/Element.nextElementSibling" title="zh-cn/DOM/Element.nextElementSibling"><code>nextElementSibling</code></a></li>
+</ul>
+
+<p>{{ languages( {"en": "en/DOM/element.previousElementSibling" } ) }}</p>