How can I hide the Guestpass access code when user are typing on Guest Portal

[Anonymous]

When users enter the access code in the guest portal, we need this code not to be visible, when users who enter the code in the field, instead of the code in plain text, appear "*** ** ", we need it to be like when we enter Passwords.
Is it possible to activate this option?

[Anonymous]

for me also can any once help on this..