Add Javascript form validation and more

I need Javascript form validation added to an existing form. I also need a Javascript form edit overlay and possibly two or three other small tweaks of an existing website. This can be done in another clientside language as you please, as long as it's compliant with all major browsers (also mobile) and responsive. In detail: please click on the red buttons on [login to view URL] until you come to the form. I need you to make me client-side validation: - one that makes input fields in the class "input required" required, I also need a visual representation so that fields in this class will be marked one way or the other with an asterisk * - one that compares "E-mail" and "Herhaal e-mail" and makes sure they're the same and they are formatted like real emailaddresses. On the next screen I need the link "bewerk" to open a screen overlay that makes it possible to edit the user data. There are some Javascripts already in place, I want to replace them with what you're making. If you want to see this concept working, please have a look at [login to view URL] The backend is all in place, I need something new for the frontend.