I don't get it, either. Even the include is longer that directly writing a plain alert: <script type="text/javascript" src="warning.js" charset="utf-8"></s

I don't get it, either. Even the include is longer that directly writing a plain alert: <script type="text/javascript" src="warning.js" charset="utf-8"></script> versus: <script>alert('You forgot to disable JavaScript!')</script> To be fair, the following would be sufficient, but for some strange reasons the project recommends the long version: <script src="warning.js"></script>