语法高亮，滚动条美化，设置页面调整

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

@@ -4,7 +4,7 @@
 <h2 id="Summary" name="Summary">概述</h2>
 <p><code><strong>toString()</strong></code> 返回一个表示该正则表达式的字符串。</p>
 <h2 id="Syntax" name="Syntax">语法</h2>
-<pre class="syntaxbox"><var>regexObj</var>.toString()</pre>
+<pre><code class="language-javascript"><var>regexObj</var>.toString()</code></pre>
 <h3 id="Parameters" name="Parameters">参数</h3>
 <p>无</p>
 <h2 id="Description" name="Description">描述</h2>
@@ -17,7 +17,7 @@ alert(myExp.toString());       // 显示 "/a+b+c/"
 
 foo = new RegExp("bar", "g");
 alert(foo.toString());         // 显示 "/bar/g"
-</pre>
+</code></pre>
 <h2 id="规范">规范</h2>
 <table class="standard-table">
 <tbody>