Fixed Rows/Columns in Web Interfaces

We are implementing web based BPS-applications for different customers integrating the BPS interfaces into SAP Enterprise Portal. One of the main problems when using web interfaces is that you're not able to fix leading colums/rows in a way that the user only scrolls through the data cells of a layout.

Does anyone know of a way to fix leading colums or rows in BPS-Web Interfaces (either using pure HTML or Excel web component)?

HTML: When using Web Interfaces I would suggest that you have to work with frames. Has anyone done this and can provide a code example?

Excel OWC: Excel-based layouts work well with fixed rows/colums in SAP GUI. But as far as I know the Excel web component doesn't support this feature.

Thorsten