语法高亮，滚动条美化，设置页面调整

docs/javascript/Reference/Global_Objects/Boolean/toSource.html

@@ -5,18 +5,18 @@
 </div></div>
 <p><span class="short_text" id="result_box" lang="zh-CN"><span>toSource（）方法返回一个表示对象的源码的字符串。</span></span></p>
 <h2 id="语法">语法</h2>
-<pre class="syntaxbox"><var>booleanObj</var>.toSource()
-Boolean.toSource()</pre>
+<pre><code class="language-javascript"><var>booleanObj</var>.toSource()
+Boolean.toSource()</code></pre>
 <h3 id="返回值">返回值</h3>
 <p><span class="short_text" id="result_box" lang="zh-CN"><span>表示对象的源码的字符串。</span></span></p>
 <h2 id="描述">描述</h2>
 <p><span class="short_text" id="result_box" lang="zh-CN"><span>toSource方法返回以下值：</span></span></p>
 <ul>
 <li><span id="result_box" lang="zh-CN"><span>对于内置的</span></span> <a href="Reference/Boolean" title="此页面仍未被本地化, 期待您的翻译!"><code>Boolean</code></a> <span lang="zh-CN"><span>对象，toSource返回以下字符串，表示源代码不可用：</span></span>
-<pre class="brush: js">function Boolean() {
+<pre><code  class="language-javascript">function Boolean() {
     [native code]
 }
-</pre>
+</code></pre>
 </li>
 <li><span class="short_text" id="result_box" lang="zh-CN"><span>对于</span></span> <a href="Reference/Boolean" title="此页面仍未被本地化, 期待您的翻译!"><code>Boolean</code></a><span class="short_text" lang="zh-CN"><span> 的实例，toSource返回一个表示源代码的字符串。</span></span></li>
 </ul>

docs/javascript/Reference/Global_Objects/Boolean/toString.html

@@ -4,7 +4,7 @@
 <div><iframe class="interactive interactive-js" frameborder="0" height="250" src="https://interactive-examples.mdn.mozilla.net/pages/js/boolean-tostring.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="Syntax" name="Syntax">语法</h2>
-<pre class="syntaxbox"><var>bool</var>.toString()</pre>
+<pre><code class="language-javascript"><var>bool</var>.toString()</code></pre>
 <h3 id="返回值">返回值</h3>
 <p>表示特定<a href="Reference/Boolean" title="此页面仍未被本地化, 期待您的翻译!"><code>Boolean</code></a>对象的字符串。</p>
 <h2 id="Description" name="Description">描述</h2>
@@ -14,9 +14,9 @@
 <h2 id="示例">示例</h2>
 <h3 id="使用_toString">使用 <code>toString</code></h3>
 <p>下面的代码，<code>flag.toString</code> 返回 "<code>true</code>"：</p>
-<pre class="brush: js">var flag = new Boolean(true)
+<pre><code  class="language-javascript">var flag = new Boolean(true)
 var myVar = flag.toString()
-</pre>
+</code></pre>
 <h2 id="规范">规范</h2>
 <table class="standard-table">
 <tbody>

docs/javascript/Reference/Global_Objects/Boolean/valueOf.html

@@ -4,7 +4,7 @@
 <div><iframe class="interactive interactive-js" frameborder="0" height="250" src="https://interactive-examples.mdn.mozilla.net/pages/js/boolean-valueof.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="Syntax" name="Syntax">语法</h2>
-<pre class="syntaxbox"><code><var>bool</var>.valueOf()</code></pre>
+<pre><code class="language-javascript"><code><var>bool</var>.valueOf()</code></code></pre>
 <h3 id="返回值">返回值</h3>
 <p>给定<a href="Reference/Boolean" title="此页面仍未被本地化, 期待您的翻译!"><code>Boolean</code></a>对象的原始值</p>
 <h2 id="Description" name="Description">描述</h2>
@@ -12,9 +12,9 @@
 <p>该方法通常在 JavaScript 内部调用，而不是在代码中显式调用。</p>
 <h2 id="Examples" name="Examples">示例</h2>
 <h3 id="Example:_Using_valueOf" name="Example:_Using_valueOf">使用 <code>valueOf</code></h3>
-<pre class="brush: js">x = new Boolean();
+<pre><code  class="language-javascript">x = new Boolean();
 myVar = x.valueOf()      // assigns false to myVar
-</pre>
+</code></pre>
 <h2 id="规范">规范</h2>
 <table class="standard-table">
 <tbody>