title: jquery keyup dont work from code, but work from chrome.console
body: <p>I made a google chrome plugin</p>
  
  <p>tasks (on sportingbet.com):</p>
  
  <ul>
  <li>put price for the bet</li>
  <li>submit the basket</li>
  </ul>
  
  <p>the problem:</p>
  
  <ul>
  <li><code>$(".userItems input.amount").val(110);</code> ->  works (but need to trigger the keyup)</li>
  <li><code>$(".userItems input.amount").keyup();</code> -> doesn't work but when I type this in the console, it works.</li>
  </ul>
  
  <p>Whats the difference?</p>