title: How to replace characters, inside specific tag using javascript
body: <p>I need to replace characters inside specific tag using javascript when page loads. I have a big list of characters to be replaced. so it will be fast and should work with major browsers. 
  example:-</p>
  
  <pre><code>&lt;p&gt; The quick brown fox jumps over the lazy dog &lt;/p&gt;
  </code></pre>
  
  <p>will need to looks like</p>
  
  <pre><code>&lt;p&gt; h=f t)ujh lk.,h ghy tfbm' bhjf ghy {&gt;ht Frt &lt;/p&gt;
  </code></pre>
  
  <p>Thanks!</p>