jQuery.ajax()
Perform an asynchronous HTTP (Ajax) request.
Perform an asynchronous HTTP (Ajax) request.
Handle custom Ajax options or modify existing options before each request is sent and before they are processed by $.ajax().
End the most recent filtering operation in the current chain and return the set of matched elements to its previous state.
Select all elements that have at least one child node (either an element or text).
Select all elements that have no children (including text nodes).