title: How to give a textbox focus for keyPress and typeKeys
body: <p>If I use typeKeys or keyPress with the target being a textbox, then nothing happens if the textbox does not have focus. How do I give focus to the textbox?</p>
  
  <p>E.G. The following should delete a character from my_textbox, but it only works if I manually click on the textbox before running it.</p>
  
  <pre><code>&lt;tr&gt;
    &lt;td&gt;keyPress&lt;/td&gt;
    &lt;td&gt;css=#my_textbox&lt;/td&gt;
    &lt;td&gt;\8&lt;/td&gt;
  &lt;/tr&gt;
  </code></pre>