title: Backbone.Js - what's the difference between el and $el?
body: <p>So I've been stuck for the whole afternoon on <a href="https://stackoverflow.com/questions/10638802/backbone-js-and-jqueryui-dialog-events-not-binding/10640233#10640233">this problem</a> which I eventually solved.  It turned out I was assigning el instead of $el.</p>
  
  <p>What's the difference between the two and when should I use each of them?</p>