title: Running raw javascript (from plain text)
body: <p>I'm trying to execute JavaScript from plain text (from being entered by a client).  I also need a way to see if the executed code works or not (if it does, then it does, otherwise, it needs to spit out a non-variable error message).</p>
  
  <p>Thanks if you can!  The stuff that will be executed would be short strings such as:</p>
  
  <pre><code>echo("a","b")
  </code></pre>