Adding Javascript to an ASP.NET page based on Environment Setting

Hello,
I have a Web.Config App.Setting which holds the following

<appSettings>
  <add key="Environment" value="Development"/>
</appSettings>

I am then reading this value and depending the value I will read a particular JavaScript from a file.

i.e
<script src="~/Scripts/Development.js"></script>
or
<script src="~/Scripts/Test.js"></script>

etc