onAction in a portal

I was playing around with elements on portal lines, but I have some questions:

If I do: elements.fieldname.bgcolor = ‘ffffff’
all the lines are colored!
Is it possible to color only the current row?

This is also happening when you do that with an element in list or table-view!!

and

elements.fieldname.requestFocus() is not working!
what I want to do is, creating a portalline by a method, and up with the cursor blinking in a specific field in that portalline!
is this possible?