title: Uncaught TypeError: Cannot call method 'get' of null
body: <p>I know there are many threads about this issue and i ve been looking for my specific case but i have not found anything relevant.</p>
  
  <p>I am implementing this <a href="http://tommywebdesigner.com/untitle.html" rel="nofollow">javascript cashRegister effect</a> in this <a href="http://tommywebdesigner.com/Producto%20copy.html" rel="nofollow">page</a> but i get this error msg</p>
  
  <p>"Uncaught TypeError: Cannot call method 'get' of null"</p>
  
  <p>It points to the raw 18 of the plugin.js:</p>
  
  <pre><code>var current_value = this.element.get('text');
  </code></pre>
  
  <p>What might cause this error? What i should try to do now?</p>
  
  <p>Thanks</p>