> There is a way to track escaped webpages using 
JavaScript? 
> Some sites use a program called HTML Protector or similar 
> that transforms a webpage in a series of escaped 
characters. 

No, you can't - javascript is a near perfect solution 
against automated tools.
 
[ Note: webmasters should be aware that these programs are 
a bit dangerous: search engines will never index these 
pages, and disabled/blind people using specific tools to 
read WWW pages (text-based) will never read them too. ]