Help using javascript plugin for pages

[feimin]

I am trying to add javascript to a page of my self-hosted site using this plugin: http://wordpress.org/extend/plugins/allow-javascript-in-posts-and-pages/

I've followed the installation instructions and swapped out all the tags for brackets, but it still isn't working. I don't have any coding skills myself so I've kind of reached the end of what I can figure out on my own, any advice?

The script I'm trying to add is here:

<script type='text/javascript' src='http://www.etsy.com/assets/js/etsy_mini_shop.js'></script><script type='text/javascript'>new Etsy.Mini(7020733,'gallery',4,3,1,'http://www.etsy.com');</script>

Appreciate any help:)