js捕捉键盘事件和按键键值的方法

如下所示：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script language="javascript" type="text/javascript">
function test(){
  alert('test');
}
function Hotkey(event, targetObj, ctrlKey, shiftKey, altKey, keycode){
  if (targetObj && event.ctrlKey == ctrlKey && event.shiftKey == shiftKey && event.altKey == altKey && event.keyCode == keycode)
    targetObj.click();
}
function fnKeyup(event){
  var b = document.getElementById("myButton");
  Hotkey(event, b, true, false, false, 13);
}
if (document.addEventListener){
  document.addEventListener("keyup",fnKeyup,true);
}else{
  document.attachEvent("onkeyup",fnKeyup);
}
</script>
<body>
<input type="button" id="myButton" name="Submit" value="按钮" onclick="test()" />
</body>
</html>

js键盘键值

keycode  8 = BackSpace BackSpace
keycode  9 = Tab Tab
keycode  12 = Clear
keycode  13 = Enter
keycode  16 = Shift_L
keycode  17 = Control_L
keycode  18 = Alt_L
keycode  19 = Pause
keycode  20 = Caps_Lock
keycode  27 = Escape Escape
keycode  32 = space space
keycode  33 = Prior
keycode  34 = Next
keycode  35 = End
keycode  36 = Home
keycode  37 = Left
keycode  38 = Up
keycode  39 = Right
keycode  40 = Down
keycode  41 = Select
keycode  42 = Print
keycode  43 = Execute
keycode  45 = Insert
keycode  46 = Delete
keycode  47 = Help
keycode  48 = 0 equal braceright
keycode  49 = 1 exclam onesuperior
keycode  50 = 2 quotedbl twosuperior
keycode  51 = 3 section threesuperior
keycode  52 = 4 dollar
keycode  53 = 5 percent
keycode  54 = 6 ampersand
keycode  55 = 7 slash braceleft
keycode  56 = 8 parenleft bracketleft
keycode  57 = 9 parenright bracketright
keycode  65 = a A
keycode  66 = b B
keycode  67 = c C
keycode  68 = d D
keycode  69 = e E EuroSign
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 mu
keycode  78 = n N
keycode  79 = o O
keycode  80 = p P
keycode  81 = q Q at
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  96 = KP_0 KP_0
keycode  97 = KP_1 KP_1
keycode  98 = KP_2 KP_2
keycode  99 = KP_3 KP_3
keycode 100 = KP_4 KP_4
keycode 101 = KP_5 KP_5
keycode 102 = KP_6 KP_6
keycode 103 = KP_7 KP_7
keycode 104 = KP_8 KP_8
keycode 105 = KP_9 KP_9
keycode 106 = KP_Multiply KP_Multiply
keycode 107 = KP_Add KP_Add
keycode 108 = KP_Separator KP_Separator
keycode 109 = KP_Subtract KP_Subtract
keycode 110 = KP_Decimal KP_Decimal
keycode 111 = KP_Divide 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 187 = acute grave
keycode 188 = comma semicolon
keycode 189 = minus underscore
keycode 190 = period colon
keycode 192 = numbersign apostrophe
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 220 = less greater bar
keycode 221 = plus asterisk asciitilde
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

document.onkeydown = keydown;
function keydown(){
 var keycode = event.keyCode;
 if(keycode == 13) {
 alert("test");
 }
}

<body onload="JavaScript:document.getElementById('textfield2').focus();">

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