Adding a trigger to the pagebreak button
Since revision revision 34 you are able to add Javascript triggers to the Pagebreak buttons as well. The following example will display a simple alert message when you click the Next button from your first form page:
<script type="text/javascript">
function newF()
{
alert("Changing page.");
}
</script>
The trigger is added by going to the Components tab, editing your Pagebreak button and adding the following line in the Additional attributes property:
onclick="newF();"