title: Why don't browsers throw an error when any other word is used in place of 'javascript' in the value of onclick?
body: <p>I inherited a website, and just came across this curiosity:</p>
  
  <pre><code>&lt;a href="/delete"  onClick="jamoscript:return confirm('Do you really want to do that?');"&gt;Delete all&lt;/a&gt;
  </code></pre>
  
  <p>I can display the page containing it and click the link to get the confirmation dialog box exactly the same as I do when I change "<code>jamoscript</code>" to "<code>javascript</code>". No diagnostics are displayed in the Firebug console, either when the page is loaded or when the link is clicked. What the hey? Googling for jamoscript doesn't turn up anything interesting.</p>
  
  <p>Can anybody explain this behavior?</p>