title: Javascript html broken link mailto/report
body: <p>I need a javascript or html solution for simple html page.
  html link code opens a link, but if link is broken it opens something like an alternative link with code like:</p>
  
  <pre><code>&lt;form action="mailto:broken-link@report.com?subject=link.com/dead is broken" method="POST" enctype="text/plain" name="formulier" onsubmit="return;"&gt;
  </code></pre>
  
  <p>It this possible or am I thinking about something not realizable?</p>