event keycodeevent.keyCode||event.which什么意思

js中window.event.keyCode！=8什么意思？

判断事件按下的是否为 BackSpace 键 event.keycode值大全 1 keycode 8 = BackSpace BackSpace 2 keycode 9 = Tab Tab 3 keycode 12 = Clear 4 keycode 13 = Enter 5 keycode 16 = Shift_L 6 keycode 17 = Control_L 7 keycode 18 = Alt_L 8 keycode 19 = Pause 9 keycode 20 = Caps_Lock 10 keycode 27 = Escape Escape 11 keycode 32 = space space 12 keycode 33 = Prior 13 keycode 34 = Next 14 keycode 35 = End 15 keycode 36 = Home 16 keycode 37 = Left 17 keycode 38 = Up 18 keycode 39 = Right 19 keycode 40 = Down 20 keycode 41 = Select 21 keycode 42 = Print 22 keycode 43 = Execute 23 keycode 45 = Insert 24 keycode 46 = Delete 25 keycode 47 = Help 26 keycode 48 = 0 equal braceright 27 keycode 49 = 1 exclam onesuperior 28 keycode 50 = 2 quotedbl twosuperior 29 keycode 51 = 3 section threesuperior 30 keycode 52 = 4 dollar 31 keycode 53 = 5 percent 32 keycode 54 = 6 ampersand 33 keycode 55 = 7 slash braceleft 34 keycode 56 = 8 parenleft bracketleft 35 keycode 57 = 9 parenright bracketright 36 keycode 65 = a A 37 keycode 66 = b B 38 keycode 67 = c C 39 keycode 68 = d D 40 keycode 69 = e E EuroSign 41 keycode 70 = f F 42 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 76 keycode 108 = KP_Separator KP_Separator 77 keycode 109 = KP_Subtract KP_Subtract 78 keycode 110 = KP_Decimal KP_Decimal 79 keycode 111 = KP_Divide KP_Divide 80 keycode 112 = F1 81 keycode 113 = F2 82 keycode 114 = F3 83 keycode 115 = F4 86 keycode 116 = F5 87 keycode 117 = F6 88 keycode 118 = F7 89 keycode 119 = F8 90 keycode 120 = F9 91 keycode 121 = F10 92 keycode 122 = F11 93 keycode 123 = F12

event.keyCode||event.which什么意思

判断keyCode和which两个函数， 下面应该还跟有IF判断或者循环语句