title: NoAlertPresentException when attempting to accept alert using SST Python
body: <p>I'm attempting to accept a javascript alert that pops up when deleting an element on my webpage. When I use <code>accept_alert()</code> or <code>dismiss_alert()</code>, I'm receiving the <code>NoAlertPresentException: Message: u'no alert open\n</code> message. My code looks like this:</p>
  
  <pre><code>click_element(get_element_by_xpath('//*[@id="tracker"]/table[4]/tbody/tr/td[1]/a[1]'),wait=True)
  accept_alert('Do you wish to delete?')
  </code></pre>
  
  <p>I have only been working with SST for 2 weeks, so I may be missing a simple solution. </p>
  
  <p>The code that calls the javascript alert is as follows:</p>
  
  <pre><code>&lt;a href="javascript: void(0);" onclick="return DeleteFood(1293652875);" class="track_remove" title="Remove"&gt;⊗&lt;/a&gt;
  </code></pre>