[TYPO3-mvc] Fluid - How to exchange values of different formfields

[Mario Beiser]

Hi everybody,

got a short question to get the correct syntax working:

Got a fieldset like this:

<f:form.textbox property="foo" value="" />
<f:form.hidden property="bar" value="{value.of.form.field.foo}" />

As you see, I would use the input of "foo" also as values of "bar".
Now, what's the correct syntax to solve my issue?

Thanks for your help.
Cheers
Mario