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按键测试，支持像 Ctrl+Alt+Shift+T 的组合键（注：非浏览器热键）
<script type="text/javascript">
function showKeyName(e)
{
var keyName;
switch(e.keyCode)
{
case 8:keyName = "[退格]";break;
case 9:keyName = "[Tab]";break;
case 13:keyName = "[Enter]";break;
case 16:keyName = "[Shift]";break;
case 17:keyName = "[Ctrl]";break;
case 18:keyName = "[Alt]";break;
case 19:keyName = "[PauseBreak]";break;
case 20:keyName = "[Caps Lock]";break;
case 27:keyName = "[Esc]";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 45:keyName = "[Insert]";break;
case 46:keyName = "[Delete]";break;
case 91:keyName = "[左Win]";break;
case 92:keyName = "[右Win]";break;
case 93:keyName = "[快捷菜单键]";break;
case 95:keyName = "[Sleep]";break;
case 96:keyName = "[小键盘区0]";break;
case 97:keyName = "[小键盘区1]";break;
case 98:keyName = "[小键盘区2]";break;
case 99:keyName = "[小键盘区3]";break;
case 100:keyName = "[小键盘区4]";break;
case 101:keyName = "[小键盘区5]";break;
case 102:keyName = "[小键盘区6]";break;
case 103:keyName = "[小键盘区7]";break;
case 104:keyName = "[小键盘区8]";break;
case 105:keyName = "[小键盘区9]";break;
case 106:keyName = "[*]";break;
case 107:keyName = "[+]";break;
case 109:keyName = "[-]";break;
case 110:keyName = "[.]";break;
case 111:keyName = "[/]";break;
case 112:keyName = "[F1]";break;
case 113:keyName = "[F2]";break;
case 114:keyName = "[F3]";break;
case 115:keyName = "[F4]";break;
case 116:keyName = "[F5]";break;
case 117:keyName = "[F6]";break;
case 118:keyName = "[F7]";break;
case 119:keyName = "[F8]";break;
case 120:keyName = "[F9]";break;
case 121:keyName = "[F10]";break;
case 122:keyName = "[F11]";break;
case 123:keyName = "[F12]";break;
case 144:keyName = "[NumLock]";break;
case 145:keyName = "[ScrollLock]";break;
case 186:keyName = "[;]";break;
case 187:keyName = "[=]";break;
case 188:keyName = "[,]";break;
case 189:keyName = "[-]";break;
case 190:keyName = "[.]";break;
case 191:keyName = "[/]";break;
case 192:keyName = "[`]";break;
case 219:keyName = "[[]";break;
case 220:keyName = "[\\]";break;
case 221:keyName = "[]]";break;
case 222:keyName = "[']";break;
//case 255:keyName = "[Power]";break; //奇怪，怎么[Power]键和[Wake]键键值是一样的？
case 255:keyName = "[Wake]";break;
default:keyName = "[" + String.fromCharCode(e.keyCode) + "]";break;
}
if((e.shiftKey)&&(e.keyCode!=16)){keyName = "[Shift] + " + keyName;}
if((e.altKey)&&(e.keyCode!=18)){keyName = "[Alt] + " + keyName;}
if((e.ctrlKey)&&(e.keyCode!=17)){keyName = "[Ctrl] + " + keyName;}
return keyName;
}
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