title: jQuery - how to access jQuery object?
body: <p>I'm struggling to find out when to use #,$ in jquery.
  i.e. if I have an object</p>
  
  <pre><code>var elem{
  }
  </code></pre>
  
  <p>How to access this?
  Whether $('#elem') or $('elem')?
  May be its too silly. But I cant find out a solution by googling it.</p>