title: How to add Tags in text node with Javascript
body: <p>This is probably very easy/obvious.
  I'm writing a Chrome extention.
  My Javascript catches the text nodes from any site and changes part of the text to something else. I would like to mark the changed text by changing its color (adding tags).</p>
  
  <pre><code>return "&lt;font color = \"FF0000\"&gt;"+a+"&lt;/font&gt;"
  </code></pre>
  
  <p>And the result:</p>
  
  <pre><code>&lt;font color = "FF0000"&gt;SomeText&lt;/font&gt;
  </code></pre>
  
  <p>But all I want of course is that the <strong>SomeText</strong> will appear in red.</p>