[CFORMS] onsubmit called twice! with text field and @submit-on-change

[Josep A. Frau]

I have a text field with submit-on-change and a submit button on my form:
<fd:field id="P_CODPOS">
  <fi:styling submit-on-change="true"/>
  <fd:label>C.P.</fd:label>
  <fd:hint>Codi Postal</fd:hint>
  <fd:datatype base="string"/>
  <fd:on-value-changed>
    <javascript>
      ...
    </javascript>
  </fd:on-value-changed>
</fd:field>

<fd:submit id="B_MODIFICA_PERSONA" validate="true">
   <fd:label>Modificar dades</fd:label>
</fd:submit>

I get an alert with the message "onsubmit called twice!" when change the 
field value and, before leave the field, push the submit button.

The same occur if I change the value of P_CODPOS and press Enter key for 
submit the form.

When the field is a selection list this behavior can occur too. If I 
change value and push the submit button quickly but its more improbable 
the user make it voluntarily.

I have tested in Cocoon 2.1.7 with Firefox 1.0.6 and Explorer 6.0.

Is that the wished behavior?

In the forms-lib.js there is the function forms_onsubmit():

function forms_onsubmit() {
   if (forms_onsubmitHandlers == null) {
       alert("onsubmit called twice!");
   }

   for (var i = 0; i < forms_onsubmitHandlers.length; i++) {
       forms_onsubmitHandlers[i].forms_onsubmit();
   }
   // clear it
   forms_onsubmitHandlers = null;
}

This function is called each time a submit is fired. The first time is 
fired by the onchange event of P_CODPOS field and later the event of 
submit button.

In any case, I think that this behavior of the user is possible. Must 
the user see this message? It's safe just:

if (forms_onsubmitHandlers == null) {
    return;
   }

This don't show the alert, but follow the submit process. 

Thanks, 

--
Josep A. Frau <[EMAIL PROTECTED]>
Centre de Tecnologies de la Informació
Universitat de les Illes Balears