The easiest method is to put the form in an ajax component:

{{=LOAD('mycontroller', 'myform.load', ajax=True)}}

What do you mean by "renew the data in frontend"? Are you showing a grid on 
the same page as the form? If so, you can load the grid in a separate Ajax 
component, and add some Javascript that reloads the grid component whenever 
the form is submitted.

Anthony

On Thursday, July 4, 2013 7:55:45 AM UTC-4, Dmitri Husti wrote:
>
> Hi,
> I cant figure out how to use FORMS with ajax.
> Howto refresh the FORM in frontend if you dont pass the validation.
> And howto renew the data in frontend if the validation was passed and a 
> new row is in
> the database.
> The whole thing with ajax. A small example would be nice.
>
> Best regards 
> Dmitri Husti
>

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