Web-application software testing fundamentals

My software testing experience is from a functional business scenario background. I am moving to another job that is very similar to this but is predominantly web-based testing. Do you know what differences in testing approaches and coverage I might potentially see from functional (predominantly) Web testing?

Apologies if this is a vague Question. Brief Description of duties:

Experience in a software testing role performing functional, integration and regression testing

Good understanding of the software development life-cycle

Good understanding of testing methodologies

Test resource planning and assignment

Analysis of functionality delivered vs. business requirement