Xquery function problem

["Sebastian Hinterwälder"]

Hello,

I am right now writing an xquery which puts out an html page.
The query is working inside of the eXist database. 
Inside the query I would like to process an xquery function only 
if another xquery function is already finished. Therefore 
I tried to create an if-clause with the function as argument 
(  {if( local:bla) then}  ) This does not seem to work properly, 
but also no error is thrown. I hope someone can help me. 
For better understanding I put some code here:


(: in the request I try to get a variable that is only 
true if button is checked:)
let $barchart := request:get-parameter("barchart","")

(: my radio button:)
<input type="radio" name="diagram" id="barchart" value="barchart"></input>

(: try to process a function only if button checked:)
{
if ( $barchart) then local:transform($list,$diagram)
else ()
}

(: want to get true only if function is already processed once:)
{
if(local:transform($list,$diagram)) then (
 <p><INPUT TYPE="submit" VALUE="Grafik anzeigen" 
         onClick="goTo('')"INPUT></p>
) else ()
}



I already posted the same thread in the eXist gmane list, but I wasn't able to solve the problem! Here is a link to the old thread:

http://thread.gmane.org/gmane.text.xml.exist/12730/focus=12762

Hope someone knows how it works?

Greets Sebastian
-- 
"Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ...
Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail