Default [Q] How to analyze HTML

Hey all! I want to create my first app!

This app just displays a html page from the web.
But this webpage can be "filtered". So i want to give the user the opportunity to filter some details out of the html file...

can anybody help me? If there is someone who really can help me, i of course could also send you the html page and my more detailed way of thinking...!

Thanks in advance!