<script type="text/javascript" language=JavaScript charset="UTF-8">

 2       document.onkeydown=function(event){

 3             var e = event || window.event || arguments.callee.caller.arguments[0];

 4             if(e && e.keyCode==27){ // 按 Esc

 5                 //要做的事情

 6               }

 7             if(e && e.keyCode==113){ // 按 F2

 8                  //要做的事情

 9                }

10              if(e && e.keyCode==13){ // enter 键

11                  //要做的事情

12             }

13         };

14 </script>

1 js 里面的键盘事件经常用到，所以收集了键盘事件对应的键码来分享下：

  2 keyCode 8 = BackSpace BackSpace

  3 keyCode 9 = Tab Tab

  4 keyCode 12 = Clear

  5 keyCode 13 = Enter

  6 keyCode 16 = Shift_L

  7 keyCode 17 = Control_L

  8 keyCode 18 = Alt_L

  9 keyCode 19 = Pause

 10 keyCode 20 = Caps_Lock

 11 keyCode 27 = Escape Escape

 12 keyCode 32 = space

 13 keyCode 33 = Prior

 14 keyCode 34 = Next

 15 keyCode 35 = End

 16 keyCode 36 = Home

 17 keyCode 37 = Left

 18 keyCode 38 = Up

 19 keyCode 39 = Right

 20 keyCode 40 = Down

 21 keyCode 41 = Select

 22 keyCode 42 = Print

 23 keyCode 43 = Execute

 24 keyCode 45 = Insert

 25 keyCode 46 = Delete

 26 keyCode 47 = Help

 27 keyCode 48 = 0 equal braceright

 28 keyCode 49 = 1 exclam onesuperior

 29 keyCode 50 = 2 quotedbl twosuperior

 30 keyCode 51 = 3 section threesuperior

 31 keyCode 52 = 4 dollar

 32 keyCode 53 = 5 percent

 33 keyCode 54 = 6 ampersand

 34 keyCode 55 = 7 slash braceleft

 35 keyCode 56 = 8 parenleft bracketleft

 36 keyCode 57 = 9 parenright bracketright

 37 keyCode 65 = a A

 38 keyCode 66 = b B

 39 keyCode 67 = c C

 40 keyCode 68 = d D

 41 keyCode 69 = e E EuroSign

 42 keyCode 70 = f F

 43 keyCode 71 = g G

 44 keyCode 72 = h H

 45 keyCode 73 = i I

 46 keyCode 74 = j J

 47 keyCode 75 = k K

 48 keyCode 76 = l L

 49 keyCode 77 = m M mu

 50 keyCode 78 = n N

 51 keyCode 79 = o O

 52 keyCode 80 = p P

 53 keyCode 81 = q Q at

 54 keyCode 82 = r R

 55 keyCode 83 = s S

 56 keyCode 84 = t T

 57 keyCode 85 = u U

 58 keyCode 86 = v V

 59 keyCode 87 = w W

 60 keyCode 88 = x X

 61 keyCode 89 = y Y

 62 keyCode 90 = z Z

 63 keyCode 96 = KP_0 KP_0

 64 keyCode 97 = KP_1 KP_1

 65 keyCode 98 = KP_2 KP_2

 66 keyCode 99 = KP_3 KP_3

 67 keyCode 100 = KP_4 KP_4

 68 keyCode 101 = KP_5 KP_5

 69 keyCode 102 = KP_6 KP_6

 70 keyCode 103 = KP_7 KP_7

 71 keyCode 104 = KP_8 KP_8

 72 keyCode 105 = KP_9 KP_9

 73 keyCode 106 = KP_Multiply KP_Multiply

 74 keyCode 107 = KP_Add KP_Add

 75 keyCode 108 = KP_Separator KP_Separator

 76 keyCode 109 = KP_Subtract KP_Subtract

 77 keyCode 110 = KP_Decimal KP_Decimal

 78 keyCode 111 = KP_Divide KP_Divide

 79 keyCode 112 = F1

 80 keyCode 113 = F2

 81 keyCode 114 = F3

 82 keyCode 115 = F4

 83 keyCode 116 = F5

 84 keyCode 117 = F6

 85 keyCode 118 = F7

 86 keyCode 119 = F8

 87 keyCode 120 = F9

 88 keyCode 121 = F10

 89 keyCode 122 = F11

 90 keyCode 123 = F12

 91 keyCode 124 = F13

 92 keyCode 125 = F14

 93 keyCode 126 = F15

 94 keyCode 127 = F16

 95 keyCode 128 = F17

 96 keyCode 129 = F18

 97 keyCode 130 = F19

 98 keyCode 131 = F20

 99 keyCode 132 = F21

100 keyCode 133 = F22

101 keyCode 134 = F23

102 keyCode 135 = F24

103 keyCode 136 = Num_Lock

104 keyCode 137 = Scroll_Lock

105 keyCode 187 = acute grave

106 keyCode 188 = comma semicolon

107 keyCode 189 = minus underscore

108 keyCode 190 = period colon

109 keyCode 192 = numbersign apostrophe

110 keyCode 210 = plusminus hyphen macron

111 keyCode 211 =

112 keyCode 212 = copyright registered

113 keyCode 213 = guillemotleft guillemotright

114 keyCode 214 = masculine ordfeminine

115 keyCode 215 = ae AE

116 keyCode 216 = cent yen

117 keyCode 217 = questiondown exclamdown

118 keyCode 218 = onequarter onehalf threequarters

119 keyCode 220 = less greater bar

120 keyCode 221 = plus asterisk asciitilde

121 keyCode 227 = multiply division

122 keyCode 228 = acircumflex Acircumflex

123 keyCode 229 = ecircumflex Ecircumflex

124 keyCode 230 = icircumflex Icircumflex

125 keyCode 231 = ocircumflex Ocircumflex

126 keyCode 232 = ucircumflex Ucircumflex

127 keyCode 233 = ntilde Ntilde

128 keyCode 234 = yacute Yacute

129 keyCode 235 = oslash Ooblique

130 keyCode 236 = aring Aring

131 keyCode 237 = ccedilla Ccedilla

132 keyCode 238 = thorn THORN

133 keyCode 239 = eth ETH

134 keyCode 240 = diaeresis cedilla currency

135 keyCode 241 = agrave Agrave atilde Atilde

136 keyCode 242 = egrave Egrave

137 keyCode 243 = igrave Igrave

138 keyCode 244 = ograve Ograve otilde Otilde

139 keyCode 245 = ugrave Ugrave

140 keyCode 246 = adiaeresis Adiaeresis

141 keyCode 247 = ediaeresis Ediaeresis

142 keyCode 248 = idiaeresis Idiaeresis

143 keyCode 249 = odiaeresis Odiaeresis

144 keyCode 250 = udiaeresis Udiaeresis

145 keyCode 251 = ssharp question backslash

146 keyCode 252 = asciicircum degree

147 keyCode 253 = 3 sterling

148 keyCode 254 = Mode_switch

149 使用event对象的keyCode属性判断输入的键值

150 eg：if(event.keyCode==13)alert(“enter!”);

151 键值对应表

152 A　　0X65 　U 　　0X85

153 B　　0X66　 V　　 0X86

154 C　　0X67　 W　　 0X87

155 D　　0X68　 X 　　0X88

156 E　　0X69　 Y　　 0X89

157 F　　0X70　 Z　　 0X90

158 G　　0X71　 0　　 0X48

159 H　　0X72　 1　　 0X49

160 I　　0X73　 2　　 0X50

161 J　　0X74　 3 　　0X51

162 K　　0X75　 4 　　0X52

163 L　　0X76　 5 　　0X53

164 M　　0X77　 6　　 0X54

165 N　　0X78 　7 　　0X55

166 O　　0X79 　8 　　0X56

167 P　　0X80 　9 　　0X57

168 Q　　0X81　ESC　　0X1B

169 R　　0X82　CTRL 　0X11

170 S　　0X83　SHIFT　0X10

171 T　　0X84　ENTER　0XD

172 如果要使用组合键，则可以判断是否同时按下了这几个键，比如ctrl键、shift键以及alt键的组合使用就可以判断是否多按下了ctrl键、shift键以及alt键