Getting an empty JQuery object

This creates an empty jQuery-object:

$([])

Update: In newer versions of jQuery (1.4+), you can use:

$()

$();

Returning an Empty Set

As of jQuery 1.4, calling the jQuery() method with no arguments returns an empty jQuery set (with a .length property of 0). In previous versions of jQuery, this would return a set containing the document node.

Source: api.jquery.com