title: alerting simple value from js variable
body: <p>I'm trying to alert value of javascript variable like this</p>
  
  <pre><code>var id = $(this).attr('id');
  
  alert(id.valueOf());
  </code></pre>
  
  <p>but this alerting only <code>object Object</code> even I'm sure that id should contain only one digit number. </p>
  
  <p>What I'm doing wrong here?</p>