He all:

I have the fields:

    field1=TextField()
    field2=TextField()
    field3=TextField()

I show that in the kid template in a form:

    <span py:content="display_field_for('field1')" />
    <span py:content="display_field_for('field2')" />
    <span py:content="display_field_for('field3')" />

How I do so that when entering a value in field1 or field2, show the sum
in the field3, without pressing the submit button...?

I suppose that using javascript, ajax, but I don't know how to do it.
(And  I couldn't find the suitable tutorial...)

Have anyone any pointers to solve the problem?
Thanks.

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