var winpop = null;

function popup() {
	if( !winpop || winpop.closed ) {
		winpop = window.open('', 'popwin',
			'width=600,height=400,resizable=1,menubar=1,scrollbars=1');
	} else {
		winpop.focus();
	}
}

function check_submit_popup() {
	popup();
	return true;
}