Hello i have an osclass website, i made some custom fields required with this code
<script type="text/javascript">
$("#countryId").attr('required', 'required');
$("#regionId").attr('required', 'required');
$("#city").attr('required', 'required');
$("#cityArea").attr('required', 'required');
$("#contactName").attr('required', 'required');
$("#price").attr('required', 'required');
</script>
please help me to change the default message to : "please fill out this field"
Thank you very much