Help with firing an event from a button

Hello.

I'm trying making JUMPROWSUP from a button click. The pretended final
code is commented out; debugging code, not.

-------------------------------------------------

print "--- --- ---"
if self.findParentOfType('GFForm') != None:
   print "GFInstance found"
if self.findParentOfType('GFLayout') != None:
   print "GFLaout found"
if self.findParentOfType('GFPage') != None:
   print "GFPage found"
print "--- --- ---"

## Perform list page up
# form =  self.findParentOfType('GFForm')
# if form != None:
#   form.dispatchEvent('JUMPROWSUP');
	 
-------------------------------------------------

First Question. Is this a good approach ?

Second: Why can't I find the form object with findParentOfType()? should
I walk up myself thru the tree to find it?

Thanks in advance.
-- 
José Esteban
Granada - Spain