title: Replace word with jQuery
body: <p>I have word Hello on most of my pages and i want to change it to Welcome.
  Is it possible and if yes how to replace the words with jQuery?</p>
  
  <pre><code>Hello
  &lt;p&gt;Hello user Jack&lt;/p&gt;
  &lt;div&gt;Hell ow you from us
      &lt;h1&gt;12344 Hello&lt;/h1&gt;
      &lt;div&gt;Hellow&lt;/div&gt;
  &lt;/div&gt;
  &lt;script src="jquery-1.5.1.min.js" type="text/javascript"&gt;&lt;/script&gt;
  </code></pre>