引用mui.zoom.js报错

<script src="../../lib/mui.js" type="text/javascript" charset="utf-8"></script>
<script src="../../lib/mui.zoom.js" type="text/javascript" charset="utf-8"></script>
<script src="../../lib/mui.previewimage.js" type="text/javascript" charset="utf-8"></script>
<script src="../../js/dealer/editItems.bundle.js"></script>
报了下面的错误：
Uncaught ReferenceError: mui is not defined at lib/mui.zoom.js:320
Uncaught ReferenceError: mui is not defined at lib/mui.previewimage.js:434