The .ajaxSend() method registers a handler to be called when Ajax is about to send the request.
Whenever an Ajax request is about to be sent, jQuery triggers the ajaxSend event. Any and all handlers that have been registered with the ajaxSend() method are executed at this time.
This method has the form:
|Specifies the function to run when the ajaxSend event is triggered|
This form returns a jQuery object.