Knowing how deep you're in a folder tree

[Dan Melomedman]

Hi. What I am basically trying to do, is display folder list in
tree-like fashion when you are deep in folder tree. I need to know how
deep I am in the folder tree to calculate correct indents. I wonder if
there's already something like this in sqwebmail's code as it is not
obvious to me. One way of doing this would be (he he) counting dots in
'folderdir', but that's too naive. I am confused by cgi(), what does it do?
Thanks in advance.