title: Backbonejs and underscorejs files included but browser console showing eror
body: <blockquote>
    <p>I downloaded backbone.js and underscore.js and included it in the  tags and defined the model but the browser is showing uncaught error and anonymous function </p>
  </blockquote>
  
  <pre><code>&lt;!DOCTYPE html&gt;
    &lt;html&gt;
   &lt;head lang="en"&gt;
   &lt;meta charset="UTF-8"&gt;
   &lt;title&gt;Backbone Twitter&lt;/title&gt;
  &lt;/head&gt;
    &lt;body&gt;
  
  &lt;h1&gt;Backbone for Testing&lt;/h1&gt;
  &lt;script src="backbone.js"&gt;&lt;/script&gt;
  &lt;script src="   ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"&gt;&lt;/script&gt;
  &lt;script src="underscore.js"&gt;&lt;/script&gt;
  &lt;script&gt;
  var Tweet = Backbone.Model.extend({
  
  
  
  
  });
  
  console.log(new Tweet({author: 'ABCD', status: 'Hi Backbone Js' }));
  &lt;/script&gt;
  
  
   &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <blockquote>
    <p>I have watched tutorials they do the same way, very new to Backbonejs</p>
  </blockquote>