Use AJAX to validate a field

[eluser]rogierb[/eluser]
Implementing ajax into CI is a piece of cake. You can create a controller called 'ajax' or some other name you fancy. This controller is doing the checking, ofcourse db stuff go into the 'ajax' model, view stuff into view.

In your view which has the input field, do an ajax call like you normally would, where you call you ajax controller. like: hhttp://yoursite.com/ajax/checkmyfield/withthisvalue.

so you have:
ajax controller
ajax model
ajax field

and your nomal controller/view

Hope this helps.