title: keep option selected after a refresh
body: <p>I have a list of people sorted by 2 parameters that I insert in a select. </p>
  
  <p>How can, when someone select a parameter, maintain this one selected when he refresh or change/return on the page?</p>
  
  <p>I see some issues on some post over the internet, but most of them use JQuery, and I don't want to use it.</p>
  
  <p>The code is like this:</p>
  
  <pre><code>&lt;select name="idactivity_contact[]" id="_activity" multiple="multiple" size="10" style="width:150px;"&gt;
      &lt;option disabled="disabled" style="background-color:#dddddd;font-weight:bold;"&gt;Shipbroking&lt;/option&gt;
      &lt;option value="1"&gt;Newbuilding&lt;/option&gt;
      &lt;option value="2"&gt;Sales and Purchase&lt;/option&gt;
      &lt;option value="3"&gt;Bulk&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>The code is generated in PHP actyally manually, but i will do a function later </p>