A signup login form with validation using jQuery AJAX

This signup-login page was designed keeping 4 user classes in mind:

• Student
• Teacher
• HOD (that is 'Head of Department')
• Administration

Of course, they can be changed to your liking

• Intelligent. The Fields change depending on the user
• Validation. Provides appropriate validation for various fields.
• Database. Also coupled with the backend database, in case you are working on a similar application
• Email. Comes with the markup for a Welcome Mail! (which i will show later)
• Its responsive! So, it looks good on all mobiles, tablets, laptops and desktops with any orientation.

• The user first signs up. If the password is adequate and the email entered is registered in the database, then a confirmation link is sent.
• From this welcome mail, the user activates his account by clicking on the activation link.
• They are redirected to the home page
• Now the user logs in with their new username and password.

• check_login.php : It just checks if the user has already logged in. It will go directly to thier page if so.
• connect.inc.php : Used to connect to the database
• session.inc.php : starts a session.
• index.php : contains the markup for the signup-login page
• login.js : Consists of the validation code for all fields
• login.php : consists of the backend code for the login form.
• signup.php : has the backend code for the signup form AND the markup for the welcome email
• confirm.php : activates the user account and is triggered from the welcome mail