event.which
For key or mouse events, this property indicates the specific key or button that was pressed.
All the aspects of the API that were added, or had a new signature added, in the corresponding version of jQuery.
jQuery 1.1.3 Release Notes
For key or mouse events, this property indicates the specific key or button that was pressed.
Contains flags for the useragent, read from navigator.userAgent. We recommend against using this property; please try to use feature detection instead (see jQuery.support). jQuery.browser may be moved to a plugin in a future release of jQuery.
Sorts an array of DOM elements, in place, with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers.