not able to build code

[jaygray0919]

Am not able to build a sample using the index.html, main.js and main.css. Am calling the scrips like this:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript" src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script type="text/javascript" src="dagr-d3.js" charset="utf-8"></script>
<script src="main.js"></script>

Also, graph1.js and graph2.js are in the local directory.

Am I doing something wrong?