[Webtest] Dealing with frames

[Carlo E. T. Oliveira]

Is there any primitves to deal with frames? If I invoke a page 
describing frames, how do I get to each frame?  Or could it be a way to 
find a tag regardless of the frame it appears? I tried the normal 
primitives but when invoking the framed page it failed. I had to figure 
out the particular frame url and invoke it to work. I looked for a way 
to select the frame in the api but did not discovered how.

Carlo