action into a button

hi everybody,
i want to do an action with a html:button,

i did this:

Code:

---

<html:button value="Annuler" onclick="annuler('<bean:write name="taskbean" property="taskinstanceId"/>');"></html:button>

---

but i have error on 'annuler' function .
can you help me ????

Salut,

Si c'est de la fonction annuler que le problème vient il faudrait nous donner le code ta fonction.

function annuler(taskid)
{
document.location.href="/MonApplication/annuler.do?taskId="+taskid;
}

voici la fonction