I am fiddling with this for some time already but still dont have the perfect solution.

I have a page where i use a plugin which enables me to put "raw HTML" into a post or page. On this page are tables, forms, javascript etc.

The forms are using a bunch of external javascripts, like

http://www. somesite.com/scripts/somescript.js

I know we have a field below each post where we can put in javascript code, but the documentation for this is VERY cryptic.
I can put in direct code with functions in this field in wordpress, but can i also just put references to external scripts in there?

(Eg. except actual snippets of code i want to put in

<script> http://www. somesite.com/scripts/somescript.js </script>

But this does not seem to work! I also cannot get this to work when i put the script into the post (between my tags where i can post raw HTML).

And i also dont want to put this in the global site HEAD because that would be overkill. Any idea how can i do this, using external JS in wordpress?