Penelope01 on "Javascript not working on page"

I am newbe converting an existing site to WordPress and have a test page at http://www.go-motion.com/jrmusic/stockists/

This is a page which uses javascript to display a list of dealers in a given state.

When I pasted the code from the existing site into a wordpress page in text view the script did not work.

Obviously I am not doing this correctly.
I need to use only one script on a single page there should be a simple way to do this

<script type="text/javascript" language="JavaScript1.2" src="http;//www.go-motion.com/jrmusic/stores.js"></script>" should go in the header of the page
then to get the list of dealers in the form when they click the button

"input onclick="go(this.form.SelectURL.options)" type="button" value="GO" />"

I have searched to find a solution but the more I read the more confused I become.

All suggestions will be gratefully received
Many thanks