function newAnnouncementWindow() {
	announcementWindow = window.open("announcement.html", "announcementWindow", "width=750,height=550,resizable=yes,scrollbars=yes,status=no,toolbar=yes,addressbar=no,menubar=no");
}
function closeWindow() {
	if(window.name=="announcementWindow") {
		self.close()
	}
}