javascript - How can I know a 2 last pressed key on a keyboard -

is possible know, 2 last keys pressed on keyboard?
how can it?
need compare keys, , if same - make function.
example, if press enter - first function, if after enter press space- second function. if after enter press ctrl - third function.
so, hink onw way - make 2 var current , previous key value, , make if else if function
:-)
way, how current key value

$('#text').keydown(function(event) {   $('#show').text(event.keycode); }); 

or, better question! (i saw right now)
directly in editor, after press doublespace - jump anothe line in live-preview.
how works? i'm not sure, thinks need same.
thank much!

you start very simple jquery plugin:

(function($) {     $.fn.keywatcher = function() {         return this.keydown(function(evt){             var $this =  $(this);            var prevevt = $this.data('prevevt');             $this.trigger('multikeydown',[prevevt,evt]);             $this.data('prevevt',evt);         });     }; })(jquery); 

this raise new event (multikeydown) whenever keydown event raised. either provide keydown event current key press, or if there previous 1 provide too.

usage like:

$(document).keywatcher().bind('multikeydown',function(evt,prevkey,currkey){     alert('prevkey = ' + ((prevkey) ? string.fromcharcode(prevkey.keycode) : '(none)'));     alert('currkey = ' + string.fromcharcode(currkey.keycode)); }); 

live example (press keys on lower right hand pane in jsfiddle): http://jsfiddle.net/9vmuy/1/

the event provided in prevkey , currkey parameters event handler contain original keydown events, have full access keycode, ctrlkey , shiftkey properties etc.