语法高亮，滚动条美化，设置页面调整

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

@@ -8,9 +8,9 @@
 <h2 id="Summary" name="Summary">概述</h2>
 <p>返回函数的源代码的字符串表示.</p>
 <h2 id="Syntax" name="Syntax">语法</h2>
-<pre class="syntaxbox"><code><var>function</var>.toSource();
+<pre><code class="language-javascript"><code><var>function</var>.toSource();
 Function.toSource();
-</code></pre>
+</code></code></pre>
 <h3 id="Parameters" name="Parameters">参数</h3>
 <p>无</p>
 <h2 id="Description" name="Description">描述</h2>
@@ -19,9 +19,9 @@ Function.toSource();
 <ul>
 <li>对于内置的<code>Function</code>对象,<code>toSource</code>返回下面的字符串:</li>
 </ul>
-<pre class="brush: js"><code>function Function() {
+<pre><code  class="language-javascript"><code>function Function() {
     [native code]
-}</code></pre>
+}</code></code></pre>
 <ul>
 <li>对于自定义函数来说, <code>toSource返回能定义该函数</code>的Javascript源码.</li>
 </ul>