So through:
Site Settings > Master Page > Alternate CSS URL
one can set the CSS that a particular master page will use. I'm wondering if there is a similar mechanism for Javascript or do I simply use the standard:
<script type="text/javascript"src="Includes/default.js"></script>
There isn't any alternative like for css files.
But instead of using the standard script tag for including a javascript file, try to use the same server control used in the default master page for including the core.js file.
Try this to solve the problem !!! Thanks to Markitup
http://markitup.com/Posts/Post.aspx?postId=5338c901-c910-4af0-bbca-6ae0067df759
<script language="javascript"
type="text/javascript"
src="<%= Request.ApplicationPath %>/myhelper.js">
</script>
