Does anyone know of a good, lightweight ajax username validator? I've found a few, but you have to click a button in order for it to check the username. All it does is connect to the username table of your existing database and if the username you want is available, it will display something like a green checkmark or "Available" next to the textbox and if its taken it will say something like "Taken" or display a red X image next to the textbox. I just dont want the user to have to click a button in order to validate it. If anyone knows of or has such a script, please share!
http://jqueryfordesigners.com/using-ajax-to-validate-forms/ That gives code, but you may need to modify it to suit your needs