js键盘按钮keyCode及示例大全

以功能区分布

以 keycode 编号顺序分布

keycode 0 =

keycode 1 =
keycode 2 =
keycode 3 =
keycode 4 =
keycode 5 =
keycode 6 =
keycode 7 =
keycode 8 = BackSpace
keycode 9 = Tab
keycode 10 =
keycode 11 =
keycode 12 = Clear
keycode 13 = Enter
keycode 14 =
keycode 15 =
keycode 16 = Shift_L
keycode 17 = Control_L
keycode 18 = Alt_L
keycode 19 = Pause
keycode 20 = Caps_Lock
keycode 21 =
keycode 22 =
keycode 23 =
keycode 24 =
keycode 25 =
keycode 26 =
keycode 27 = Esc Escape
keycode 28 =
keycode 29 =
keycode 30 =
keycode 31 =
keycode 32 = Space
keycode 33 = Page Up
keycode 34 = Page Down
keycode 35 = End
keycode 36 = Home
keycode 37 = Left Arrow
keycode 38 = Up Arrow
keycode 39 = Right Arrow
keycode 40 = Down Arrow
keycode 41 = Select
keycode 42 = Print
keycode 43 = Execute
keycode 44 =
keycode 45 = Insert
keycode 46 = Delete
keycode 47 = Help
keycode 48 = 0 )
keycode 49 = 1 !
keycode 50 = 2 @
keycode 51 = 3 #
keycode 52 = 4 $
keycode 53 = 5 %
keycode 54 = 6 ^
keycode 55 = 7 &
keycode 56 = 8 *
keycode 57 = 9 (
keycode 58 =
keycode 59 =
keycode 60 =
keycode 61 =
keycode 62 =
keycode 63 =
keycode 64 =
keycode 65 = a A
keycode 66 = b B
keycode 67 = c C
keycode 68 = d D
keycode 69 = e E
keycode 70 = f F
keycode 71 = g G
keycode 72 = h H
keycode 73 = i I
keycode 74 = j J
keycode 75 = k K
keycode 76 = l L
keycode 77 = m M
keycode 78 = n N
keycode 79 = o O
keycode 80 = p P
keycode 81 = q Q
keycode 82 = r R
keycode 83 = s S
keycode 84 = t T
keycode 85 = u U
keycode 86 = v V
keycode 87 = w W
keycode 88 = x X
keycode 89 = y Y
keycode 90 = z Z
keycode 91 =
keycode 92 =
keycode 93 =
keycode 94 =
keycode 95 =
keycode 96 = KP_0
keycode 97 = KP_1
keycode 98 = KP_2
keycode 99 = KP_3
keycode 100 = KP_4
keycode 101 = KP_5
keycode 102 = KP_6
keycode 103 = KP_7
keycode 104 = KP_8
keycode 105 = KP_9
keycode 106 = KP_* KP_Multiply
keycode 107 = KP_+ KP_Add
keycode 108 = KP_Enter KP_Separator
keycode 109 = KP_- KP_Subtract
keycode 110 = KP_. KP_Decimal
keycode 111 = KP_/ KP_Divide
keycode 112 = F1
keycode 113 = F2
keycode 114 = F3
keycode 115 = F4
keycode 116 = F5
keycode 117 = F6
keycode 118 = F7
keycode 119 = F8
keycode 120 = F9
keycode 121 = F10
keycode 122 = F11
keycode 123 = F12
keycode 124 = F13
keycode 125 = F14
keycode 126 = F15
keycode 127 = F16
keycode 128 = F17
keycode 129 = F18
keycode 130 = F19
keycode 131 = F20
keycode 132 = F21
keycode 133 = F22
keycode 134 = F23
keycode 135 = F24
keycode 136 = Num_Lock
keycode 137 = Scroll_Lock
keycode 138 =
keycode 139 =
keycode 140 =
keycode 141 =
keycode 142 =
keycode 143 =
keycode 144 =
keycode 145 =
keycode 146 =
keycode 147 =
keycode 148 =
keycode 149 =
keycode 150 =
keycode 151 =
keycode 152 =
keycode 153 =
keycode 154 =
keycode 155 =
keycode 156 =
keycode 157 =
keycode 158 =
keycode 159 =
keycode 160 =
keycode 161 =
keycode 162 =
keycode 163 =
keycode 164 =
keycode 165 =
keycode 166 =
keycode 167 =
keycode 168 =
keycode 169 =
keycode 170 =
keycode 171 =
keycode 172 =
keycode 173 =
keycode 174 =
keycode 175 =
keycode 176 =
keycode 177 =
keycode 178 =
keycode 179 =
keycode 180 =
keycode 181 =
keycode 182 =
keycode 183 =
keycode 184 =
keycode 185 =
keycode 186 =
keycode 187 = =+
keycode 188 = ,<
keycode 189 = -_
keycode 190 = .>
keycode 191 = /?
keycode 192 = `~
keycode 193 =
keycode 194 =
keycode 195 =
keycode 196 =
keycode 197 =
keycode 198 =
keycode 199 =
keycode 200 =
keycode 201 =
keycode 202 =
keycode 203 =
keycode 204 =
keycode 205 =
keycode 206 =
keycode 207 =
keycode 208 =
keycode 209 =
keycode 210 = plusminus hyphen macron
keycode 211 =
keycode 212 = copyright registered
keycode 213 = guillemotleft guillemotright
keycode 214 = masculine ordfeminine
keycode 215 = ae AE
keycode 216 = cent yen
keycode 217 = questiondown exclamdown
keycode 218 = onequarter onehalf threequarters
keycode 219 = [{
keycode 220 = \|
keycode 221 = ]}
keycode 222 = '"

keycode 223 =
keycode 224 =
keycode 225 =
keycode 226 =
keycode 227 = multiply division
keycode 228 = acircumflex Acircumflex
keycode 229 = ecircumflex Ecircumflex
keycode 230 = icircumflex Icircumflex
keycode 231 = ocircumflex Ocircumflex
keycode 232 = ucircumflex Ucircumflex
keycode 233 = ntilde Ntilde
keycode 234 = yacute Yacute
keycode 235 = oslash Ooblique
keycode 236 = aring Aring
keycode 237 = ccedilla Ccedilla
keycode 238 = thorn THORN
keycode 239 = eth ETH
keycode 240 = diaeresis cedilla currency
keycode 241 = agrave Agrave atilde Atilde
keycode 242 = egrave Egrave
keycode 243 = igrave Igrave
keycode 244 = ograve Ograve otilde Otilde
keycode 245 = ugrave Ugrave
keycode 246 = adiaeresis Adiaeresis
keycode 247 = ediaeresis Ediaeresis
keycode 248 = idiaeresis Idiaeresis
keycode 249 = odiaeresis Odiaeresis
keycode 250 = udiaeresis Udiaeresis
keycode 251 = ssharp question backslash
keycode 252 = asciicircum degree
keycode 253 = 3 sterling
keycode 254 = Mode_switch

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简记表

数字值	实际键值
48到57	0到9
65到90	a到z（A到Z）
112到135	F1到F24
8	BackSpace（退格）
9	Tab
13	Enter（回车）
20	Caps_Lock（大写锁定）
32	Space（空格键）
37	Left（左箭头）
38	Up（上箭头）
39	Right（右箭头）
40	Down（下箭头）

使用示例：

组合键

if ((window.event.ctrlKey)&&(window.event.keyCode==49))

alert("您按下了CTRL＋1键");

从以上例子可以看出，shift、Control、Alt 在JS中也可用“window.event.shiftKey”、“window.event.ctrlKey”、“window.event.altKey” 代替。

Internet Explorer/Chrome 浏览器使用 event.keyCode 取回被按下的字符，而 Netscape/Firefox/Opera 等浏览器使用 event.which。

获取用户按下的键

下面是一个利用 onkeydown 事件获取用户按下键盘按键信息的例子：

<html>
<body>
<script type="text/javascript">

function noNumbers(e)
{
    var keynum;
    var keychar;

    keynum = window.event ? e.keyCode : e.which;
    keychar = String.fromCharCode(keynum);
    alert(keynum+':'+keychar);
}

</script>
<input type="text" onkeydown="return noNumbers(event)" />
</body>
</html>

如上面例子所示，event.keyCode/event.which 得到的是一个按键对应的数字值（Unicode 编码），常用键值对应如下：

在 Web 应用中，常常可以看到利用 onkeydown 事件的 event.keyCode/event.which 来获取用户的一些键盘操作，从而运行某些运用的例子。如在用户登录时，如果按下了大写锁定键（20），则加以提示大写锁定；在有翻页的时候，如果用户按下左右箭头，触发上下翻页等。

获得 Unicode 编码值之后，如果需要得到实际对应的按键值，可以通过 Srting 对象的 fromCharCode 方法（String.fromCharCode()）获得。注意，对于字符获得的始终是大写字符，而对于其他一些功能按键，得到的字符可能不太易阅读。

javascript判断是否按回车键

<input id="chatMsg" name="chatMsg" type="text"

size="90" onkeypress="enterHandler(event);"/>

function enterHandler(event)

{

//获取用户单击键盘的“键值”

var keyCode = event.keyCode ? event.keyCode 

: event.which ? event.which : event.charCode;

//如果是回车键

if (keyCode == 13)

{

sendRequest();

}

}

屏蔽按键组合健

function Key Down(){
  if ((window.event.altKey)&&
      ((window.event.keyCode==37)||   //屏蔽 Alt+ 方向键 ←
       (window.event.keyCode==39))){  //屏蔽 Alt+ 方向键 →
     alert("不准你使用ALT+方向键前进或后退网页！");
     event.returnValue=false;
     }
  if ((event.keyCode==8)||            //屏蔽退格删除键
      (event.keyCode==116)){          //屏蔽 F5 刷新键
     event.keyCode=0;
     event.returnValue=false;
     }
  if ((event.ctrlKey)&&(event.keyCode==78)){   //屏蔽 Ctrl+n
     event.returnValue=false;
     }
  if ((event.shiftKey)&&(event.keyCode==121)){ //屏蔽 shift+F10
     event.returnValue=false;
     }
  if (event.keyCode==122){ //屏蔽 F11
     event.returnValue=false;
     }
  } 

获取键和相应值的js

另附上一段代码，

可以根据按的键盘上的键，显示键盘动作，并显示keyCode值等

<STYLE TYPE="text/css">
TD {text-align:center}
</STYLE>
<SCRIPT LANGUAGE="JavaScript">
function init() {
    document.onkeydown = showKeyDown
    document.onkeyup = showKeyUp
    document.onkeypress = showKeyPress
}

function showKeyDown(evt) {
    evt = (evt) ? evt : window.event
    document.getElementById("pressKeyCode").innerHTML = 0
    document.getElementById("upKeyCode").innerHTML = 0
    document.getElementById("pressCharCode").innerHTML = 0
    document.getElementById("upCharCode").innerHTML = 0
    restoreModifiers("")
    restoreModifiers("Down")
    restoreModifiers("Up")
    document.getElementById("downKeyCode").innerHTML = evt.keyCode
    if (evt.charCode) {
        document.getElementById("downCharCode").innerHTML = evt.charCode
    }
    showModifiers("Down", evt)
}
function showKeyUp(evt) {
    evt = (evt) ? evt : window.event
    document.getElementById("upKeyCode").innerHTML = evt.keyCode
    if (evt.charCode) {
        document.getElementById("upCharCode").innerHTML = evt.charCode
    }
    showModifiers("Up", evt)
    return false
}
function showKeyPress(evt) {
    evt = (evt) ? evt : window.event
    document.getElementById("pressKeyCode").innerHTML = evt.keyCode
    if (evt.charCode) {
        document.getElementById("pressCharCode").innerHTML = evt.charCode
    }
    showModifiers("", evt)
    return false
}
function showModifiers(ext, evt) {
    restoreModifiers(ext)
    if (evt.shiftKey) {
        document.getElementById("shift" + ext).style.backgroundColor = "#ff0000"
    }
    if (evt.ctrlKey) {
        document.getElementById("ctrl" + ext).style.backgroundColor = "#00ff00"
    }
    if (evt.altKey) {
        document.getElementById("alt" + ext).style.backgroundColor = "#0000ff"
    }
}
function restoreModifiers(ext) {
    document.getElementById("shift" + ext).style.backgroundColor = "#ffffff"
    document.getElementById("ctrl" + ext).style.backgroundColor = "#ffffff"
    document.getElementById("alt" + ext).style.backgroundColor = "#ffffff"
}
</SCRIPT>
</HEAD>

<BODY onLoad="init()">
<H1>Keyboard Event Handler Lab</H1>
<HR>
<FORM>
<TABLE BORDER=2 CELLPADDING=2>
<TR><TH></TH><TH>onKeyDown</TH><TH>onKeyPress</TH><TH>onKeyUp</TH></TR>
<TR><TH>Key Codes</TH>
    <TD ID="downKeyCode">0</TD>
    <TD ID="pressKeyCode">0</TD>
    <TD ID="upKeyCode">0</TD>
</TR>
<TR><TH>Char Codes (IE5/Mac; NN6)</TH>
    <TD ID="downCharCode">0</TD>
    <TD ID="pressCharCode">0</TD>
    <TD ID="upCharCode">0</TD>
</TR>
<TR><TH ROWSPAN=3>Modifier Keys</TH>
    <TD><SPAN ID="shiftDown">Shift</SPAN></TD>
    <TD><SPAN ID="shift">Shift</SPAN></TD>
    <TD><SPAN ID="shiftUp">Shift</SPAN></TD>
</TR>
<TR>
    <TD><SPAN ID="ctrlDown">Ctrl</SPAN></TD>
    <TD><SPAN ID="ctrl">Ctrl</SPAN></TD>
    <TD><SPAN ID="ctrlUp">Ctrl</SPAN></TD>
</TR>
<TR>
    <TD><SPAN ID="altDown">Alt</SPAN></TD>
    <TD><SPAN ID="alt">Alt</SPAN></TD>
    <TD><SPAN ID="altUp">Alt</SPAN></TD>
</TR>
</TABLE>
</FORM>

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