For example I have a `textfield`. The field is mandatory, only numbers are required and length of value must be 10. When I try to submit form with value which length is 5, the default error message appears: `Please match the requested format` 

```
<input type="text" required="" pattern="[0-9]{10}" value="">

```

1. How can I change HTML 5 form validation errors default messages?
2. If 1st point can be done, so Is there a way to create some property files and set in that files custom error messages?