js键盘事件
兼容ie9和firefox12：
<html>
<body>
<script>
function keydown(e){//ff中存在隐藏变量e，ie中不存在隐藏变量e
var e = e||event;//ff中返回隐藏变量(ff中没有window.event)，ie中返回window.event
var key = e.keyCode;
if(key == 65){
alert('a');
}
}
document.onkeydown = keydown;
</script>
</body>
</html>
备注：
|
字母和数字键的键码值(keyCode) |
|||||||
|
按键 |
键码 |
按键 |
键码 |
按键 |
键码 |
按键 |
键码 |
|
A |
65 |
J |
74 |
S |
83 |
1 |
49 |
|
B |
66 |
K |
75 |
T |
84 |
2 |
50 |
|
C |
67 |
L |
76 |
U |
85 |
3 |
51 |
|
D |
68 |
M |
77 |
V |
86 |
4 |
52 |
|
E |
69 |
N |
78 |
W |
87 |
5 |
53 |
|
F |
70 |
O |
79 |
X |
88 |
6 |
54 |
|
G |
71 |
P |
80 |
Y |
89 |
7 |
55 |
|
H |
72 |
Q |
81 |
Z |
90 |
8 |
56 |
|
I |
73 |
R |
82 |
0 |
48 |
9 |
57 |
|
数字键盘上的键的键码值(keyCode) |
|||
|
按键 |
键码 |
按键 |
键码 |
|
0 |
96 |
8 |
104 |
|
1 |
97 |
9 |
105 |
|
2 |
98 |
* |
106 |
|
3 |
99 |
+ |
107 |
|
4 |
100 |
Enter |
108 |
|
5 |
101 |
- |
109 |
|
6 |
102 |
. |
110 |
|
7 |
103 |
/ |
111 |
|
功能键键码值(keyCode) |
|||
|
按键 |
键码 |
按键 |
键码 |
|
F1 |
112 |
F7 |
118 |
|
F2 |
113 |
F8 |
119 |
|
F3 |
114 |
F9 |
120 |
|
F4 |
115 |
F10 |
121 |
|
F5 |
116 |
F11 |
122 |
|
F6 |
117 |
F12 |
123 |
|
控制键键码值(keyCode) |
|||||||
|
按键 |
键码 |
按键 |
键码 |
按键 |
键码 |
按键 |
键码 |
|
BackSpace |
8 |
Esc |
27 |
Right Arrow |
39 |
-_ |
189 |
|
Tab |
9 |
Spacebar |
32 |
Down Arrow |
40 |
.> |
190 |
|
Clear |
12 |
Page Up |
33 |
Insert |
45 |
/? |
191 |
|
Enter |
13 |
Page Down |
34 |
Delete |
46 |
`~ |
192 |
|
Shift |
16 |
End |
35 |
Num Lock |
144 |
[{ |
219 |
|
Control |
17 |
Home |
36 |
;: |
186 |
\| |
220 |
|
Alt |
18 |
Left Arrow |
37 |
=+ |
187 |
]} |
221 |
|
Cape Lock |
20 |
Up Arrow |
38 |
,< |
188 |
'" |
222 |
