Rails - Jul 2006 - Form validation with Javascript does not work

Hello,

i try to validate with JS if a Formfield has been filled with data. 
Usually I use "onsubmit()" in the form.

My Code is

<%= start_form_tag :action => ''update'', :id =>
@person.id,
"onsubmit"=>"return 
isDateSet(document.forms[0].elements[''fieldname''].value)";
%>


The JS-function returns false if length of fieldvalue < 1. So far 
everything works fine.

But: the message does not appear, the Form is posted although it should 
not.

I expect the Form not to be posted if the validation fails (false is 
returned).


Whats the correct way to do this?


Thank you


Thorsten

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