语法高亮，滚动条美化，设置页面调整

docs/javascript/Reference/Global_Objects/DataView/buffer.html

@@ -4,15 +4,15 @@
 <div><iframe class="interactive interactive-js" frameborder="0" height="250" src="https://interactive-examples.mdn.mozilla.net/pages/js/dataview-buffer.html" width="100%"></iframe></div>
 <p class="hidden">The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone <a class="external" href="https://github.com/mdn/interactive-examples" rel="noopener">https://github.com/mdn/interactive-examples</a> and send us a pull request.</p>
 <h2 id="语法">语法</h2>
-<pre class="syntaxbox"><var>dataview</var>.buffer</pre>
+<pre><code class="language-javascript"><var>dataview</var>.buffer</code></pre>
 <h2 id="描述">描述</h2>
 <p><code>buffer</code> 属性是一个访问器(accessor)属性，它的 set 属性为 undefined，这意味着它是只读的。值在 <code>DataView 被创建时就确定了，且不能改变。</code></p>
 <h2 id="示例">示例</h2>
 <h3 id="使用buffer属性"><code>使用buffer属性</code></h3>
-<pre class="brush:js">var buffer = new ArrayBuffer(8);
+<pre><code class="language-js">var buffer = new ArrayBuffer(8);
 var dataview = new DataView(buffer);
 dataview.buffer; // ArrayBuffer { byteLength: 8 }
-</pre>
+</code></pre>
 <h2 id="规范">规范</h2>
 <table class="standard-table">
 <tbody>