HTML Required Fields

If you want to make your form fields required so that the browsers stops a user from submitting empty fields, then the "required" attribute is for you. It is supported on most modern browsers and full support information can be found at http://caniuse.com/#feat=form-validation

Find the file with the HTML form you want to edit and open it in your favorite text editor.

Add the "required" attribute to each field that you want to be required.

And you are done! Remember to make sure that the browsers your users have supports this by checking the compatibility at http://caniuse.com/#feat=form-validation