title: Using python to fill in text boxes on websites, and clicking button to download
body: <p>If given a website like e.g. <a href="http://www.barchart.com/historicaldata.php" rel="nofollow">http://www.barchart.com/historicaldata.php</a>, is there a way to fill in the text box and then click the submit button to download the data?</p>
  
  <p>I'm use to using <code>urllib</code> to download entire pages, but can seem to figure out how to submit text into the text box and then click the button, from my script.</p>