Try to add to the top page (the page which must be refreshed) the following script:
Code:
<script language="javascript" type="text/javascript">
function page_reload(){
window.location.reload(true);
return true;
}
</script>
And to the form in iframe add the attribute:
onsubmit="return top.page_reload();"
I think it would work. At least if JavaScript in the user browser is turned on.
Also, if you need to refresh the whole page (not only the iframe area) on form submit, why are you using the iframe at all ? Without the iframe the whole page would reload naturally on the form submit ...