title: How to filter values in Multiple selection using textbox value
body: <p>I have a text box and multiple selection box. When ever I write something in text box it will filter that text in the multiple selection and show only matched value.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  
  &lt;body&gt;
      &lt;select id="uniqueCarNames" name="cars" multiple&gt;
          &lt;option value="volvo"&gt;Long Distance Travel&lt;/option&gt;
          &lt;option value="saab"&gt;Amazing &lt;/option&gt;
          &lt;option value="opel"&gt;Excellent Travelling&lt;/option&gt;
          &lt;option value="audi"&gt;I am rich&lt;/option&gt;
      &lt;/select&gt;
      &lt;input type="text" id="filterMultipleSelection" /&gt;
  &lt;/body&gt;
  
  &lt;/html&gt;
  </code></pre>
  
  <p>So if I start writing in input box it will start filtering the values in selection box. I want the filtering using text of option tag.
  Please guide.</p>