Check Email is Already Registered in Database using Ajax and JavaScript.

Hey,Welcome to shortlearner, today we will see how to check that email is already registered in database, with the use of ajax and java-script.
Most of the time we see that the user is registering same  email id  in database and it is registered in the database without checking that it was already registered in database.

but with the help of ajax and java-script we can show our users that their email is registered or not registered in our database by showing them a message.