title: jQ, On dropdownlist change/selection, get request on same url with ?somekey=selected-item-value
body: <p>When someone selects a drop down list item, I want to redirect to the same page but with the query string set with </p>
  
  <pre><code>www.example.com/?somekey=selected-value
  </code></pre>
  
  <p>where <code>selected-value</code> is the numeric value of the option.</p>
  
  <p>I am using jQuery if that makes it easier.</p>