Sharepoint Designer's Custom List Form, Form Action Button

The Form action button on custom list form doesn't trigger Validations on Click!, the solution is a simple one

Simply Add the folowing like
if (!Page_ClientValidate()) return false;

Like:
name="btnFormAction" onclick="javascript:if (!Page_ClientValidate()) return false; {ddwrt:GenFireServerEvent('__commit;__redirect={ThankYou.aspx}')}"

and we are done