function format(frm) {
	var err = 0;
	var err_msg;
	
	//required check
	if (!frm.elements['email'].value) {
		//E-mail
		err_msg = 'Please input E-mail';
		err = 1;
		frm.elements['email'].focus();
	}
	
	if (!err) {
		return true;
	}
	else {
		alert(err_msg);
		return false;
	}
}