在HTML文件中，请确保按以下顺序包含脚本:

In your HTML file, make sure you are including the scripts in this order:

<!-- first include jQuery -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<!-- then include your script(s) -->
<script src="YOUR_SCRIPT.js" type="text/javascript"></script>