原文地址：http://blog.csdn.net/chenhj1988918/article/details/7534922
keypress api 文档：http://api.jquery.com/keypress/
event.keycode值大全 keycode = BackSpace BackSpace keycode = Tab Tab keycode = Clear keycode = Enter keycode = Shift_L keycode = Control_L keycode = Alt_L keycode = Pause keycode = Caps_Lock keycode = Escape Escape keycode = space space keycode = Prior keycode = Next keycode = End keycode = Home keycode = Left keycode = Up keycode = Right keycode = Down keycode = Select keycode = Print keycode = Execute keycode = Insert keycode = Delete keycode = Help keycode = equal braceright keycode = exclam onesuperior keycode = quotedbl twosuperior keycode = section threesuperior keycode = dollar keycode = percent keycode = ampersand keycode = slash braceleft keycode = parenleft bracketleft keycode = parenright bracketright keycode = a A keycode = b B keycode = c C keycode = d D keycode = e E EuroSign keycode = f F keycode = g G keycode = h H keycode = i I keycode = j J keycode = k K keycode = l L keycode = m M mu keycode = n N keycode = o O keycode = p P keycode = q Q at keycode = r R keycode = s S keycode = t T keycode = u U keycode = v V keycode = w W keycode = x X keycode = y Y keycode = z Z keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_ KP_ keycode = KP_Multiply KP_Multiply keycode = KP_Add KP_Add keycode = KP_Separator KP_Separator keycode = KP_Subtract KP_Subtract keycode = KP_Decimal KP_Decimal keycode = KP_Divide KP_Divide keycode = F1 keycode = F2 keycode = F3 keycode = F4 keycode = F5 keycode = F6 keycode = F7 keycode = F8 keycode = F9 keycode = F10 keycode = F11 keycode = F12 keycode = F13 keycode = F14 keycode = F15 keycode = F16 keycode = F17 keycode = F18 keycode = F19 keycode = F20 keycode = F21 keycode = F22 keycode = F23 keycode = F24 keycode = Num_Lock keycode = Scroll_Lock keycode = acute grave keycode = comma semicolon keycode = minus underscore keycode = period colon keycode = numbersign apostrophe keycode = plusminus hyphen macron keycode = keycode = copyright registered keycode = guillemotleft guillemotright keycode = masculine ordfeminine keycode = ae AE keycode = cent yen keycode = questiondown exclamdown keycode = onequarter onehalf threequarters keycode = less greater bar keycode = plus asterisk asciitilde keycode = multiply division keycode = acircumflex Acircumflex keycode = ecircumflex Ecircumflex keycode = icircumflex Icircumflex keycode = ocircumflex Ocircumflex keycode = ucircumflex Ucircumflex keycode = ntilde Ntilde keycode = yacute Yacute keycode = oslash Ooblique keycode = aring Aring keycode = ccedilla Ccedilla keycode = thorn THORN keycode = eth ETH keycode = diaeresis cedilla currency keycode = agrave Agrave atilde Atilde keycode = egrave Egrave keycode = igrave Igrave keycode = ograve Ograve otilde Otilde keycode = ugrave Ugrave keycode = adiaeresis Adiaeresis keycode = ediaeresis Ediaeresis keycode = idiaeresis Idiaeresis keycode = odiaeresis Odiaeresis keycode = udiaeresis Udiaeresis keycode = ssharp question backslash keycode = asciicircum degree keycode = sterling keycode = Mode_switch 使用event对象的keyCode属性判断输入的键值 eg：if(event.keyCode==)alert(“enter!”); 键值对应表 A 0X65 U 0X85 B 0X66 V 0X86 C 0X67 W 0X87 D 0X68 X 0X88 E 0X69 Y 0X89 F 0X70 Z 0X90 G 0X71 0X48 H 0X72 0X49 I 0X73 0X50 J 0X74 0X51 K 0X75 0X52 L 0X76 0X53 M 0X77 0X54 N 0X78 0X55 O 0X79 0X56 P 0X80 0X57 Q 0X81 ESC 0X1B R 0X82 CTRL 0X11 S 0X83 SHIFT 0X10 T 0X84 ENTER 0XD 如果要使用组合键，则可以利用event.ctrlKey，event.shiftKey，event .altKey判断是否按下了ctrl键、shift键以及alt键