Replace comma with dot

Question

Dear all,
I'm getteing mad with the following issue and need your help.
I'm working at a PDF-Form including a table. The Values in this table create a datamatrix. This works fine for now.
Here is my issue: The values in the table are numbers like 12.2 but also 12 or 9 but maximum two digits in front of the "."(dot). Seperation character should be a "." In Germany there is the ","(comma) instead of the "." at the number block.
For better usability it would be nice having a java script that replaces onBlur all "," with a ".". So I don't have to change the keyboard language to English.
Is this possible and if yes, how?
I am an absolutely noob on javascript, so please be patient and do not expect any specific knowledge.
What I tried (menue is translatet from the German version, I don't know if it is correct:
onBlur.replace(",", ".");
I put this in (right click on form) -> properties ->action ->
add action: on mouse exit
choose action: run JavaScript
click on "add"
Then I copied the terminus from the top in the opening window. Ready (at least this was my thought...)
It dit not work, now I nedd your help.
Thank you for your hints, your help and your time.
Adobe Acrobat XI (German) on Windows 7 64bit (also german).

Answer 1

***************SOLVED**********************
The solution was much easier than expected:
when you open "properties" by right clicking on the form, go to "validation" NOT "action" (make sure you are in the form editing mode: "tools" -> "forms" -> "edit")
then chose "run user defined script" and click on "edit"
type in the following line:
event.value = event.value.replace(/\,/g, ".");
click "OK" and then "Close"
Then you are done. Now, when you leave the form field Acrobat checks if there is a comma and replaces it with a dot.
For me this was the easiest way to make it work.
***************SOLVED**********************
***************GELÖST**********************
Die Lösung war einfacher als gedacht.
Öffnet man "Eigenschaften" mit einem Rechtsklick auf das Formular, muss man "Validierung" und nicht "Aktionen" auswählen. (man muss im Formulareditierungsmodus sein: "Werkzeuge" -> "Formulare" -> "Bearbeiten")
dann unter "Benutzerdefiniertes Validierungsskript ausführen" auf "Berabeiten" klicken.
Im Editorfenster folgende Zeile eingeben:
event.value = event.value.replace(/\,/g, ".");
Über "OK" und "Schließen" zurück zu den Eigenschaften
Das war's. Nun ersetzt Acrobat im Formularfeld jedes Komma durch einen Punkt.
***************GELÖST**********************