remove code tag inside pre tag for zh-CN

3 files changed, 9 insertions, 9 deletions

diff --git a/files/zh-cn/web/javascript/reference/global_objects/math/pi/index.html b/files/zh-cn/web/javascript/reference/global_objects/math/pi/index.html
index fcfc82fbd5..efc463d5b7 100644
--- a/files/zh-cn/web/javascript/reference/global_objects/math/pi/index.html
+++ b/files/zh-cn/web/javascript/reference/global_objects/math/pi/index.html
@@ -23,11 +23,11 @@ translation_of: Web/JavaScript/Reference/Global_Objects/Math/PI
 
 <p>下面的函数使用 Math.PI 计算给定半径的圆周长：</p>
 
-<pre class="brush:js  language-js"><code class="language-js">function calculateCircumference (radius) {
+<pre class="brush:js  language-js">function calculateCircumference (radius) {
   return 2 * Math.PI * radius;
 }
 
-calculateCircumference(1);  // 6.283185307179586</code></pre>
+calculateCircumference(1);  // 6.283185307179586</pre>
 
 <h2 id="规范">规范</h2>
 
diff --git a/files/zh-cn/web/javascript/reference/global_objects/math/random/index.html b/files/zh-cn/web/javascript/reference/global_objects/math/random/index.html
index 91796ae506..04602b2699 100644
--- a/files/zh-cn/web/javascript/reference/global_objects/math/random/index.html
+++ b/files/zh-cn/web/javascript/reference/global_objects/math/random/index.html
@@ -50,11 +50,11 @@ translation_of: Web/JavaScript/Reference/Global_Objects/Math/random
 
 <p>这个例子返回了一个在指定值之间的随机整数。这个值不小于 <code>min</code> （如果 <code>min</code> 不是整数，则不小于 <code>min</code> 的向上取整数），且小于（不等于）<code>max</code>。</p>
 
-<pre class="brush: js line-numbers  language-js"><code class="language-js">function getRandomInt(min, max) {
+<pre class="brush: js line-numbers  language-js">function getRandomInt(min, max) {
   min = Math.ceil(min);
   max = Math.floor(max);
-  return Math.floor(Math.random() * (max - min)) + min; </code>//不含最大值，含最小值<code class="language-js">
-}</code></pre>
+  return Math.floor(Math.random() * (max - min)) + min; //不含最大值，含最小值
+}</pre>
 
 <div class="note">
 <p>也许很容易想到用 <code>Math.round()</code> 来实现，但是这会导致你的随机数处于一个不均匀的分布，这可能不符合你的需求。</p>
@@ -64,11 +64,11 @@ translation_of: Web/JavaScript/Reference/Global_Objects/Math/random
 
 <p>上一个例子提到的函数 <code>getRandomInt()</code> 结果范围包含了最小值，但不含最大值。如果你的随机结果需要同时包含最小值和最大值，怎么办呢?  <code>getRandomIntInclusive()</code> 函数可以实现。</p>
 
-<pre class="brush: js line-numbers  language-js"><code class="language-js">function getRandomIntInclusive(min, max) {
+<pre class="brush: js line-numbers  language-js">function getRandomIntInclusive(min, max) {
   min = Math.ceil(min);
   max = Math.floor(max);
   return Math.floor(Math.random() * (max - min + 1)) + min; //含最大值，含最小值 
-}</code></pre>
+}</pre>
 
 <h2 id="规范">规范</h2>
 
diff --git a/files/zh-cn/web/javascript/reference/global_objects/math/sign/index.html b/files/zh-cn/web/javascript/reference/global_objects/math/sign/index.html
index 60808dde44..590089e3c1 100644
--- a/files/zh-cn/web/javascript/reference/global_objects/math/sign/index.html
+++ b/files/zh-cn/web/javascript/reference/global_objects/math/sign/index.html
@@ -50,12 +50,12 @@ Math.sign();      // NaN
 
 <h2 id="Compatibility" name="Compatibility">Polyfill</h2>
 
-<pre class="brush: js  language-js"><code class="language-js">function sign(x) {
+<pre class="brush: js  language-js">function sign(x) {
     x = +x ;// convert to a number
     if (x === 0 || isNaN(x))
         return x;
     return x &gt; 0 ? 1 : -1;
-}</code></pre>
+}</pre>
 
 <p> </p>