[TYPO3] if-conditions / override

[PEF]

Sorry - but it isn't working as intended. If I create an instance i.e.;
page.5 = TEXT
page.5.field = nav_title // title

.... it displays nicely. But when used in GIFBUILDER it fails:
20 = TEXT
20 {
   text.field = nav_title // title

# or

   field = nav_title // title

# or

   text = {page:nav_title} // {page:title}

}

All the above examples fails. The first two makes empty outputs the last 
one concats the three parts:  Concept // Company concept

Regards
Peter

JoH wrote:
>>I'm having some problems with an if-condition. I've tried several
>>solutions without any succes.In short I want to create a tag
>>containing an image and a text. If not the 'nav_title' is empty - use
>>it. Else use the 'title'.
> 
> 
> 
> 20 = TEXT
> 20.text.field = nav_title // title
> 
> Done ;-)
> 
> Joey
> 
> PS: Just to avoid confusion for others - this is inside a GIFBUILDER object
> else it would have been
> 20.field = nav_title // title
>