<script>
function demo(obj,tip){
if(tip==1){
var con=document.getElementById('content').value
document.getElementById('content').value=con+obj.innerHTML
}else if(tip==2){
document.getElementById('content').value=""
}else if(tip==3){
var con=document.getElementById('content').value
document.getElementById('content').value=con.slice(0,-1)
}
}
</script>
<button onclick="demo(this,1)">7</button>
<button onclick="demo(this,1)">8</button>
<button onclick="demo(this,1)">9</button>
<br>
<button onclick="demo(this,1)">4</button>
<button onclick="demo(this,1)">5</button>
<button onclick="demo(this,1)">6</button>
<br>
<button onclick="demo(this,1)">1</button>
<button onclick="demo(this,1)">2</button>
<button onclick="demo(this,1)">3</button>
<br>
<button onclick="demo(this,2)">C</button>
<button onclick="demo(this,1)">0</button>
<button onclick="demo(this,3)">X</button>
<br>
<input type="text" id="content" />
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) 功能键键码值(keyCode)
按键 键码 按键 键码 按键 键码 按键 键码
0 96 8 104 F1 112 F7 118
1 97 9 105 F2 113 F8 119
2 98 * 106 F3 114 F9 120
3 99 + 107 F4 115 F10 121
4 100 Enter 108 F5 116 F11 122
5 101 - 109 F6 117 F12 123
6 102 . 110
7 103 / 111
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
