引入js文件

<script type="text/javascript" src="external/jquery-1.8.2.js"></script>
<script type="text/javascript" src="external/jszip.js"></script>
<script type="text/javascript" src="external/FileSaver.js"></script>
<script type="text/javascript" src="scripts/excel-gen.js"></script>
<script type="text/javascript" src="scripts/demo.page.js"></script>