[TYPO3] Conditional width of frames

[johny]

Hello everybody:

I am trying to show or hide one frame depending of the deep level of current
page.Anyone knows how to do it?

I've tried this but doesn't work:

[cols]
    [if ]
        [value]=220,*,220
        [isTrue]=treeLevel=1
    [value]=200,*


Anyone could help me, please?
Thanks in advance.

Johny