using a third party created form in my app

I used JotForm to create a form to use in my application. When I downloaded the "source code" it downloaded three things: 1) an html file 2) a css directory 3) a js directory. I want to makes sure that the new css doesn't interfere with my existing css. 

How do I display an HTML file in CI? I will need to go into it programatically and update some of the fields from my table. How to do this?

proof that an old dog can learn new tricks