title: change ajax url based on value of select option
body: <p>I have a form with a select box with three selections</p>
  
  <pre><code>&lt;select id="tool" name="tool"&gt;
      &lt;option value="option1"&gt;Option1&lt;/option&gt;
      &lt;option value="option2"&gt;Option2&lt;/option&gt;
      &lt;option value="option3"&gt;Option3&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>Each selection has its own php file</p>
  
  <ul>
  <li>option1.php</li>
  <li>option2.php</li>
  <li>option3.php</li>
  </ul>
  
  <p>Based on the selection I would like for the Ajax url to change to the respective php file</p>
  
  <p>Ajax part</p>
  
  <pre><code>$.ajax({
      type: "GET",
      url: "option1.php",
  </code></pre>