interaction between javascript and xforms

> Hello,
>  
> I would like to the result of a javascript method is use for determine
> if a xforms control is valid or not.
> My javascript method test the format of my input, and if the format is
> not good, I would like to make this input invalid.
> I'm required to use a javascript method, because the format of my input
> is very special.
>  
> I try to dispatch event with the javascript API but it happens nothing:
>  
> <xforms:input
> ref="/form/FormCommunOrbeon/DemandeTiers/mvAdresses/CTierAdresseVO[moNature/miCode
> = '3']/msTel" id="Telephone" >
>     <xforms:action ev:event="xforms-value-changed">
>         <xxforms:script>
>              if( !checkFormat(this) ) {
>                   ORBEON.xforms.Document.dispatchEvent("Telephone",
> "focus");
>               }
>          </xxforms:script>
>     </xforms:action>
>    
>     <xforms:action ev:event="DOMFocusIn">
>         <xxforms:script>
>           alert('focus');
>         </xxforms:script>
>     </xforms:action>
> </xforms:input>
>  
>  
> Have you an idea ?
>  
> thank you.
>
>
> This e-mail and any attachment is for authorised use by the intended
> recipient(s) only. It may contain proprietary material, confidential
> information and/or be subject to legal privilege. It should not be
> copied, disclosed to, retained or used by, any other party. If you are
> not an intended recipient then please promptly delete this e-mail and
> any attachment and all copies and inform the sender. Thank you.
>