title: Prototype - get value inside table cell
body: <p>I have the following piece of code (<a href="http://en.wikipedia.org/wiki/Prototype_JavaScript_Framework" rel="nofollow noreferrer">Prototype</a>):</p>
  
  <pre><code>$('table_cell_id')
  </code></pre>
  
  <p>That cell contains a number. How would I get this number into a <a href="http://en.wikipedia.org/wiki/JavaScript" rel="nofollow noreferrer">JavaScript</a> variable?</p>