Did you notice how many sites have a verification tool for the ‘username’ field when you try to register? Many use the power of AJAX to check if the nickname has already been assigned to an existing member.
Checking username availability with ajax using jQuery
The time when username availability is checked after the page is normaly processed is long way behind us. Google has it, Yahoo has it and many many more sites have it, ajax username availability checker. So in this tutorial we will make an ajax username availability checker powered with jQuery.
It’s always good to check the username or email for availability before submission. So the user can check it instantly and helps them to enter the valid one. This can be done using PHP and jQuery. Just a little code will do the rest.
Check username availability using jQuery and Ajax. Lookup can fire on keypress or button click.
We have attached the event handler to the signup_username field and we are checking the username availability via ajax when the user leaves the username field. show_message does the housekeeping for showing/hiding messages.
Checking username availability with AJAX save a lot of time rather than page post pack or reload the page, in this article we will make an ajax username availability checker powered with jQuery and web service in ASP.NET
In this short tutorial, we are going to create a script that checks for the availability of a username and returns a response to the user when they click outside the input field.