how to close Liferay.Util.openModal popup window - liferay

Question

i try use Liferay.Util.openModal to open a popup window,
but after submit, the window still there, how do i close it after click submit?
i try follow another thread Liferay: Close popup on submit?
in my main jsp:
<portlet:renderURL var="modifyPrefixURL" windowState="<%=LiferayWindowState.POP_UP.toString()%>">
<portlet:param name="mvcPath" value="/popup/modifyPrefix.jsp"/>
</portlet:renderURL>
<aui:script position="inline" use="aui-base">
window.showEditSnmPrefixDialog2 = function(id) {
Liferay.Util.openModal(
{
title: '<%=descriptionPrefixInfoEdit%>',
centered: true,
modal: true,
height: 650,
url: '<%=modifyPrefixURL.toString()%>&<portlet:namespace />targetPart='+id,
size: 'md',
close: true,
id: '<portlet:namespace/>dialog'
}
);
}
</aui:script>
<aui:script>
Liferay.provide(
window,
'<portlet:namespace/>closePopup',
function(data, dialogId) {
var A = AUI();
var dialog = Liferay.Util.Window.getById(dialogId);
dialog.destroy();
},
['liferay-util-window']
);
</aui:script>
in my modifyPrefix.jsp
<aui:script use="aui-base">
A.one('#<portlet:namespace/>closeDialog').on('click', function(event) {
Liferay.Util.getOpener().<portlet:namespace/>closePopup(data, '<portlet:namespace/>dialog');
});
</aui:script>
<aui:button name="closeDialog" type="submit" value="<%=descriptionButtonEdit%>" />
but it doesn't work.