Can we deactivate Tab keypress function inside my form ?

Can we deactivate Tab function inside my form ?

If I understand correctly, it was the keyboard Tab keypress function you wanted to disable.

You can achieve by injecting custom javascript function code with your form.

This means you will use the form source code and have it hosted on a web page.  I found an example code in the internet.

I hope this help. Let us know if you need further assistance.