title: Html drop down: how to handle key events of select option element
body: <p>i have tried the below code for creating the drop down menu in html</p>
  
  <pre><code>&lt;select onkeydown="func()"&gt;
  &lt;option&gt;a&lt;/option&gt;
  &lt;option&gt;b&lt;/option&gt;
  &lt;option&gt;c&lt;/option&gt;
  &lt;option&gt;d&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>when you click on drop down menu list opens:
  options are:
   a
   b
   c
   d
  what i m tring is on press of backspace key the drop down should close and focus has to be set to dropdown, but i m not able to fire an event when the focus is on list item of drop down.
  i would appreciate for helping me.
  thank you.</p>