function fnDataCheck(frmName) {
		if (!isText(frmName.userid.value)) {
			alert("please input your username or email as userid");
			frmName.userid.focus();
			return false;
		}
		if (!isText(frmName.password.value)) {
			alert("please input your password");
			frmName.password.focus();
			return false;
		}
		return true;
	}