4. Add following line in your robots.txt file:
a. Disallow: /scripts/ (The folder where you are placing scripts. Scripts is a standard name for search engine but you can customize the name but don’t do it until its necessary )
6. Please beware of spamming. You can spam the .js file or <noscript> tag via keyword stuffing but remember if your trying to feed more to spiders that wouldn’t be digestible.