title: Jquery String Format Replacement
body: <p>Throughout a website (without using spans/divs/id tags), how would one modify the following code such that all instances of H2O are written so that the 2 is written in a smaller font. This code currently modifies all instances of the number 2 on the whole page -- I just want to search and replace only the 2's that are written in H2O throughout the whole site.</p>
  
  <pre><code>$('body :not(script)').contents().filter(function() {
      return this.nodeType === 3;
  }).replaceWith(function() {
      return this.nodeValue.replace(/[2]/g, '&lt;font size="-1"&gt;2&lt;/font&gt;');
  });
  </code></pre>