keyCode：

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　

 case 8: keyName = "[退格]"; break;     　 　 　 case 9: keyName = "[制表]"; break;     　 　 　 case 13:keyName = "[回车]"; break;     　 　 　 case 32:keyName = "[空格]"; break;     　 　 　 case 33:keyName = "[PageUp]";   break;     　 　 　 case 34:keyName = "[PageDown]";   break;     　 　 　 case 35:keyName = "[End]";   break;     　 　 　 case 36:keyName = "[Home]";   break;     　 　 　 case 37:keyName = "[方向键左]";   break;     　 　 　 case 38:keyName = "[方向键上]";   break;     　 　 　 case 39:keyName = "[方向键右]";   break;    　 　 　   case 40:keyName = "[方向键下]";   break;     　 　 　 case 46:keyName = "[删除]";   break;     　 　 　 default:keyName = "";    break;

本文实例讲述了JS按回车键实现登录的方法，该功能有着非常广泛的实用价值。分享给大家供大家参考之用。具体方法如下：

方法一：

方法二：

使用方法：

方法三：

任何一个网站页面都有登陆界面,很多时候在输入好用户名和密码后,还要用鼠标去点一个类似于登陆什么的按钮或者链接.这样你才能进网站做你喜欢做的事情. 有时候我就在想是不是能在输入好我该输入的东西后,直接敲回车就执行登陆功能呢?解决方法如下：

ss.html页面代码:

此处注意：在里面我们加了onkeydown属性,这样我们输入好内容后按键就可以直接执行JS方法on_return()了.因为window.event.keyCode 如果是13的话,表示回车键,所以我们判断我们按的键是不是回车键,如果是我们就去找'sub'属性,假如找到了执行click方法就是了。

希望本文所述方法对大家的web程序设计有所帮助。