Requests a resource to check the element for validity.
The serverside resource is called via $.ajax (XMLHttpRequest) and gets a key/value pair, corresponding to the name of the validated element and its value as a GET parameter. The response is evaluated as JSON and must be true for valid elements, and can be any false, undefined or null for invalid elements, using the default message; or a string, eg. "That name is already taken, try peter123 instead" to display as the error message.
For more examples, take a look the marketo demo and the milk demo.
Arguments:
| options | String, Options | |
|---|---|---|
| The URL of the resource to request for serverside validation (String) or options to fully customize the request, see jQuery.ajax for details. | ||
