判断键盘按下的键

$(window).keydown(function(event) {    switch (event.which) {        case (13): //Enter            //要执行的操作            break;        case (75): //K键            //要执行的操作            break;        case (72): //H键            //要执行的操作            break;        case (76): //L键            //要执行的操作            break;    }});

如果要使用组合键，则可以利用event.ctrlKey，event.shiftKey，event .altKey判断是否按下了ctrl键、shift键以及alt键。

键盘名称	键值（keycode）	键盘名称	键值（keycode）
BackSpace	8	Tab	9
Clear	12	Enter	13
Shift_L	16	Control_L	17
Alt_L	18	Pause	19
Caps_Lock	20	Escape	27
Space	32	Prior	33
Next	34	End	35
Home	36	Left	37
Up	38	Right	39
Down	40	Select	41
Print	42	Execute	43
Insert	45	Delete	46
Help	47	0 equal braceright	48
1 exclam onesuperior	49	2 quotedbl twosuperior	50
3 section threesuperior	51	4 dollar	52
5 percent	53	6 ampersand	54
7 slash braceleft	55	8 parenleft bracketleft	56
9 parenright bracketright	57	a A	65
b B	66	c C	67
d D	68	e E EuroSign	69
f F	70	g G	71
h H	72	i I	73
j J	74	k K	75
l L	76	m M mu	77
n N	78	o O	79
p P	80	q Q at	81
r R	82	s S	83
t T	84	u U	85
v V	86	w W	87
x X	88	y Y	89
z Z	90	KP_0	96
KP_1	97	KP_2	98
KP_3	99	KP_4	100
KP_5	101	KP_6	102
KP_7	103	KP_8	104
KP_9	105	KP_Multiply	106
KP_Add	107	KP_Separator	108
KP_Subtract	109	KP_Decimal	110
KP_Divide	111	F1	112
F2	113	F3	114
F4	115	F5	116
F6	117	F8	119
F9	120	F10	121
F11	122	F12	123
F13	124	F14	125
F15	126	F16	127
F17	128	F18	129
F19	130	F20	131
F21	132	F22	133
F23	134	F24	135
Num_Lock	136	Scroll_Lock	137
Acute grave	187	Comma semicolon	188
Minus underscore	189	Period colon	190
Numbersign apostrophe	192	Plusminus hyphen macron	210
Copyright registered	212	Guillemotleft guillemotright	213
Masculine ordfeminine	214	ae AE	215
Cent yen	216	Questiondown exclamdown	217
Onequarter onehalf threequarters	218	Less greater bar	219
Plus asterisk asciitilde	221	Multiply division	227
acircumflex Acircumflex	228	ecircumflex Ecircumflex	229
icircumflex Icircumflex	230	ocircumflex Ocircumflex	231
ucircumflex Ucircumflex	232	ntilde Ntilde	233
yacute Yacute	234	oslash Ooblique	235
aring Aring	236	ccedilla Ccedilla	237
thorn THORN	238	eth ETH	239
diaeresis cedilla currency	240	agrave Agrave atilde Atilde	241
egrave Egrave	242	igrave Igrave	243
ograve Ograve otilde Otilde	244	ugrave Ugrave	245
adiaeresis Adiaeresis	246	ediaeresis Ediaeresis	247
idiaeresis Idiaeresis	248	odiaeresis Odiaeresis	249
udiaeresis Udiaeresis	250	ssharp question backslash	251
asciicircum degree	252	3 sterling	253
Mode_switch	254
A	0X65	B	0X66
C	0X67	D	0X68
E	0X69	F	0X70
J	0X71	H	0X72
I	0X73	J	0X74
K	0X75	L	0X76
M	0X77	N	0X78
O	0X79	P	0X80
Q	0X81	R	0X82
S	0X83	T	0X84
U	0X85	V	0X86
W	0X87	X	0X88
Y	0X89	Z	0X90
0	0X48	1	0X49
2	0X50	3	0X51
4	0X52	5	0X53
6	0X54	7	0X55
8	0X56	9	0X57
ESC	0X1B	CTRL	0X11
SHIFT	0X10	ENTER	0XD