path: root/files/zh-tw/web/api/keyboardevent/index.html

---
title: KeyboardEvent
slug: Web/API/KeyboardEvent
tags:
  - 待翻譯
translation_of: Web/API/KeyboardEvent
---
<p>{{APIRef("DOM Events")}}</p>

<p><strong><code>KeyboardEvent</code></strong> objects 用來詳述使用者和網頁之間，經由鍵盤產生的互動。每個事件（<code>event</code>）都記錄著一次鍵盤動作。事件類型（<code>keydown</code> 、 <code>keypress</code> 和 <code>keyup</code>）用來表示鍵盤執行哪種動作。</p>

<div class="note"><strong>注意：</strong> <code>KeyboardEvent</code> 僅顯示在鍵盤上發生的事。當你需要進行文字輸入的操作，請使用 HTML5 <code><a href="/en-US/docs/DOM/DOM_event_reference/input" rel="custom">input</a></code> event 代替 <code>KeyboardEvent</code> 。舉例來說，當使用者在手寫系統，例如平板電腦，輸入文字時，並不會啟動 key events 。</div>

<h2 id="Constructor">Constructor</h2>

<dl>
 <dt>{{domxref("KeyboardEvent.KeyboardEvent", "KeyboardEvent()")}}</dt>
 <dd>建立一 <code>KeyboardEvent</code> object。</dd>
</dl>

<h2 id="Methods">Methods</h2>

<p><em>本介面（ interface）亦繼承其父， {{domxref("UIEvent")}} 和 {{domxref("Event")}} ，的 methods</em></p>

<dl>
 <dt>{{domxref("KeyboardEvent.getModifierState()")}}</dt>
 <dd>回傳一 {{jsxref("Boolean")}}。用來表示當事件建立時，修飾鍵（例如 <kbd>Alt</kbd>、 <kbd>Shift</kbd>、 <kbd>Ctrl</kbd>、或是 <kbd>Meta</kbd>） 是否是按下的。</dd>
 <dt>{{domxref("KeyboardEvent.initKeyEvent()")}}{{deprecated_inline}}</dt>
 <dd>初始化一個 <code>KeyboardEvent</code> object。這個 method 只有 Gecko 有在使用（其他瀏覽器是使用 {{domxref("KeyboardEvent.initKeyboardEvent()")}}），並且不應該再繼續使用。現代的標準規範是使用 {{domxref("KeyboardEvent.KeyboardEvent", "KeyboardEvent()")}} constructor。</dd>
 <dt>{{domxref("KeyboardEvent.initKeyboardEvent()")}}{{deprecated_inline}}</dt>
 <dd>初始化一個 <code>KeyboardEvent</code> object。 Gecko 從未實作過該 method （Gecko 是使用 {{domxref("KeyboardEvent.initKeyEvent()")}}) ，並且不應該再繼續使用。現代的標準規範是使用 {{domxref("KeyboardEvent.KeyboardEvent", "KeyboardEvent()")}} constructor。</dd>
</dl>

<h2 id="Properties">Properties</h2>

<p><em>本介面（ interface）亦繼承其父，{{domxref("UIEvent")}} 和 {{domxref("Event")}} ，的 properties 。</em></p>

<dl>
 <dt>{{domxref("KeyboardEvent.altKey")}} {{Readonlyinline}}</dt>
 <dd>一個 {{jsxref("Boolean")}} 。用來表示在事件建立時， <kbd>Alt</kbd> （OS X 中是 <kbd>Option</kbd> 或 <kbd>⌥</kbd> ） 鍵是否執行中。</dd>
 <dt>{{domxref("KeyboardEvent.char")}} {{Non-standard_inline}}{{Deprecated_inline}}{{Readonlyinline}}</dt>
 <dd>一個 {{domxref("DOMString")}} ，返回鍵盤對應的字符。若是該鍵對應一個實際的字符，則其值為對應該字符的一個非空的 Unicode 字串；若沒對應的話，則返回一個空字串。
 <div class="note"><strong>Note:</strong> If the key is used as a macro that inserts multiple characters, this attribute's value is the entire string, not just the first character.</div>

 <div class="warning"><strong>警告:</strong> 在 DOM Level 3 Events ，該 propertie 已被移除。現在只有 IE9+ 支持它。</div>
 </dd>
 <dt>{{domxref("KeyboardEvent.charCode")}} {{Deprecated_inline}}{{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Number")}} representing the Unicode reference number of the key; this attribute is used only by the <code>keypress</code> event. For keys whose <code>char</code> attribute contains multiple characters, this is the Unicode value of the first character in that attribute. In Firefox 26 this returns codes for printable characters.
 <div class="warning"><strong>警告:</strong> 此 attribute 已被淘汰。如果可以，建議使用 {{domxref("KeyboardEvent.key")}} 。</div>
 </dd>
 <dt>{{domxref("KeyboardEvent.code")}} {{Readonlyinline}}</dt>
 <dd>一個 {{domxref("DOMString")}} 。返回事件對應的按鍵的代碼。</dd>
 <dt>{{domxref("KeyboardEvent.ctrlKey")}} {{Readonlyinline}}</dt>
 <dd>一個 {{jsxref("Boolean")}} 。用來表示在事件建立時， <kbd>Ctrl</kbd> 鍵是否執行中。</dd>
 <dt>{{domxref("KeyboardEvent.isComposing")}} {{Readonlyinline}}</dt>
 <dd>一個 {{jsxref("Boolean")}} 。用來表示其觸發時間是否在 <code>compositionstart</code> 和 <code>compositionend</code> 之間。</dd>
 <dt>{{domxref("KeyboardEvent.key")}} {{Readonlyinline}}</dt>
 <dd>一個 {{domxref("DOMString")}} ，用來事件對應的按鍵的值（key value）。</dd>
 <dt>{{domxref("KeyboardEvent.keyCode")}} {{deprecated_inline}}{{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Number")}} representing a system and implementation dependent numerical code identifying the unmodified value of the pressed key.
 <div class="warning"><strong>警告:</strong> 此 attribute 已被淘汰。如果可以，建議使用{{domxref("KeyboardEvent.key")}} 。</div>
 </dd>
 <dt>{{domxref("KeyboardEvent.locale")}} {{Readonlyinline}}</dt>
 <dd>Returns a {{domxref("DOMString")}} representing a locale string indicating the locale the keyboard is configured for. This may be the empty string if the browser or device doesn't know the keyboard's locale.
 <div class="note"><strong>Note:</strong> This does not describe the locale of the data being entered. A user may be using one keyboard layout while typing text in a different language.</div>
 </dd>
 <dt>{{domxref("KeyboardEvent.location")}}<a> {{Readonlyinline}}</a></dt>
 <dd>Returns a {{jsxref("Number")}} representing the location of the key on the keyboard or other input device.</dd>
 <dt>{{domxref("KeyboardEvent.metaKey")}} {{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Boolean")}} that is <code>true</code> if the <kbd>Meta</kbd> (on Mac keyboards, the <kbd>⌘ Command</kbd> key; on Windows keyboards, the Windows key (<kbd>⊞</kbd>)) key was active when the key event was generated.</dd>
 <dt>{{domxref("KeyboardEvent.repeat")}} {{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Boolean")}} that is <code>true</code> if the key is being held down such that it is automatically repeating.</dd>
 <dt>{{domxref("KeyboardEvent.shiftKey")}} {{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Boolean")}} that is <code>true</code> if the <kbd>Shift</kbd> key was active when the key event was generated.</dd>
 <dt>{{domxref("KeyboardEvent.which")}} {{deprecated_inline}}{{Readonlyinline}}</dt>
 <dd>Returns a {{jsxref("Number")}} representing a system and implementation dependent numeric code identifying the unmodified value of the pressed key; this is usually the same as <code>keyCode</code>.
 <div class="warning"><strong>警告:</strong> 此 attribute 已被淘汰。如果可以，建議使用 {{domxref("KeyboardEvent.key")}} 。</div>
 </dd>
</dl>

<h2 id="注意">注意</h2>

<p>KeyboardEvent 有 <code>keydown</code> 、 <code>keypress</code> 、 <code>keyup</code> 三種事件。對大多數的按鍵而言， Gecko 觸發事件的順序如下：</p>

<ol>
 <li>當按鍵按下時，會送出 <code>keydown</code> event 。</li>
 <li>當按鍵不是特殊鍵（ modifier key），例如<kbd>Ctrl</kbd> 、<kbd>Alt</kbd>……等等，會送出 <code>keypress</code> event 。</li>
 <li>當按鍵放開時，會送出 <code>keyup</code> event 。</li>
</ol>

<h3 id="特殊狀況">特殊狀況</h3>

<p>某些按鍵，例如 <kbd>Caps Lock</kbd> 、 <kbd>Num Lock</kbd> 和 <kbd>Scroll Lock</kbd> 能切換鍵盤上的 LED 燈。在 Windows 和 Linux 系統上，這些按鍵只會觸發 <code>keydown</code> 和 <code>keyup</code> 事件。但是 Linux 上的 Firefox 12 或更早的版本亦會觸發 <code>keypress</code> 事件。</p>

<p>而在 Mac 電腦則不同， <kbd>Caps Lock</kbd> 只會觸發 <code>keydown</code> 事件；而 <kbd>Num Lock</kbd> 則是只有舊版的 Mac 電腦（2007 或之前的版本）才有，現在的 Mac 即便使用外部鍵盤也不支援  <kbd>Num Lock</kbd> 。雖說舊版的 Mac 電腦支援 <kbd>Num Lock</kbd> 鍵，但 <kbd>Num Lock</kbd>  並不會執行任何 KeyboardEvent；而 Gecko 瀏覽器在特殊情況（外接一個有 <kbd>F14</kbd> 的鍵盤）下能支援 <kbd>Scroll Lock</kbd> ，但是它會產生 <code>keypress</code> 事件。這個異常狀態是個 bug ，詳情可參考 {{bug(602812)}}。</p>

<h3 id="自動迴圈（Auto-Repeat_）的執行">自動迴圈（Auto-Repeat ）的執行</h3>

<p>當按鍵按下去不放時，它會開始一個自動迴圈。並導致觸發一系列的相似事件，如下所示：</p>

<ol>
 <li><code>keydown</code></li>
 <li><code>keypress</code></li>
 <li><code>keydown</code></li>
 <li><code>keypress</code></li>
 <li>（不斷重複，直到使用者放開按鍵）</li>
 <li><code>keyup</code></li>
</ol>

<p>在 DOM Level 3 說明書有提及這問題是會發生的。其中所存在的問題如下說明：</p>

<h4 id="部分_GTK_環境，例如_Ubuntu_9.4_，的自動迴圈">部分 GTK 環境，例如 Ubuntu 9.4 ，的自動迴圈</h4>

<p>部分的 GTK-based 環境之中，自動迴圈在發生的過程中會自動觸發電腦本機的 key-up 事件。然而，對 Gecko 而言，並沒有方法可以分辨使用者重複點擊按鍵與自動迴圈（按鍵按住不放）的差異。在這類的環境下，按鍵按住不放會重複執行下列事件：</p>

<ol>
 <li><code>keydown</code></li>
 <li><code>keypress</code></li>
 <li><code>keyup</code></li>
 <li><code>keydown</code></li>
 <li><code>keypress</code></li>
 <li><code>keyup</code></li>
 <li>（不斷重複，直到使用者放開按鍵）</li>
 <li><code>keyup</code></li>
</ol>

<p>不幸地，在這些環境之下，web content 亦沒有方法告訴使用者重複點擊按鍵與自動迴圈的差異。</p>

<h4 id="Gecko_5.0_以前的自動迴圈">Gecko 5.0 以前的自動迴圈</h4>

<p>Gecko 5.0 {{geckoRelease('5.0')}} 以前，在不同平台上，鍵盤的處理與現在相比較不統一。</p>

<dl>
 <dt>Windows</dt>
 <dd>自動迴圈的結果與 Gecko 4.0 或更新的版本類似</dd>
 <dt>Mac</dt>
 <dd>在第一個 keydown 執行後，僅執行 keypress 事件，一直到案件放開（即送出 keyup 事件指令），過程中不會送出任何 keydown 事件。</dd>
 <dt>Linux</dt>
 <dd>鍵盤事件的執行根據平台不同而有所不同。它有可能表現得像是 Windows 也有可能像 Mac ，這取決於本地的事件模型（native event model）是如何執行的。</dd>
</dl>

<h2 id="範例">範例</h2>

<pre class="brush: js">&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;script&gt;
var metaChar = false;
var exampleKey = 16;

function keyEvent(event) {
  var key = event.keyCode || event.which;
  var keychar = String.fromCharCode(key);
  if (key == exampleKey) {
    metaChar = true;
  }
  if (key != exampleKey) {
    if (metaChar) {
      alert("Combination of metaKey + " + keychar);
      metaChar = false;
    } else {
      alert("Key pressed " + key);
    }
  }
}

function metaKeyUp (event) {
  var key = event.keyCode || event.which;

  if (key == exampleKey) {
    metaChar = false;
  }
}
&lt;/script&gt;
&lt;/head&gt;

&lt;body onkeydown="keyEvent(event)" onkeyup="metaKeyUp(event)"&gt;
&lt;/body&gt;
&lt;/html&gt;
</pre>

<h2 id="規格">規格</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('DOM3 Events', '#interface-KeyboardEvent', 'KeyboardEvent')}}</td>
   <td>{{Spec2('DOM3 Events')}}</td>
   <td>原始定義</td>
  </tr>
 </tbody>
</table>

<p>The <code>KeyboardEvent</code> interface specification went through numerous draft versions, first under DOM Events Level 2 where it was dropped as no consensus arose, then under DOM Events Level 3. This led to the implementation of non-standard initialization methods, the early DOM Events Level 2 version, {{domxref("KeyboardEvent.initKeyEvent()")}} by Gecko browsers and the early DOM Events Level 3 version, {{domxref("KeyboardEvent.initKeyboardEvent()")}} by others. Both have been superseded by the modern usage of a constructor: {{domxref("KeyboardEvent.KeyboardEvent", "KeyboardEvent()")}}.</p>

<h2 id="瀏覽器支援度">瀏覽器支援度</h2>

<p>More compatibility data is available on other pages:</p>

<ul>
 <li><code>.code</code>  ：請參考《瀏覽器支援度》的 {{domxref("KeyboardEvent.code")}} 部分。</li>
 <li><code>.key</code>：請參考《瀏覽器支援度》的 {{domxref("KeyboardEvent.key")}} 部分。</li>
 <li><code>.getModifierState()</code> ：請參考《瀏覽器支援度》的 {{domxref("KeyboardEvent.getModifierState")}} 部分。</li>
</ul>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td>constructor</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoDesktop("31.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.char</code></td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.charCode</code></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>.code</code></td>
   <td colspan="5" rowspan="1">See Browser compatibility of {{domxref("KeyboardEvent.code")}}.</td>
  </tr>
  <tr>
   <td><code>.isComposing</code></td>
   <td>{{CompatNo}}</td>
   <td>{{CompatGeckoDesktop("31.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.key</code></td>
   <td colspan="5" rowspan="1">See Browser compatibility of {{domxref("KeyboardEvent.key")}}.</td>
  </tr>
  <tr>
   <td><code>.keyCode</code></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>.locale</code></td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.location</code></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoDesktop("15.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.repeat</code></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatGeckoDesktop("28.0")}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.which</code></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>.getModifierState()</code></td>
   <td colspan="5" rowspan="1">See Browser compatibility of {{domxref("KeyboardEvent.getModifierState")}}</td>
  </tr>
  <tr>
   <td><code>.initKeyboardEvent()</code></td>
   <td>{{CompatVersionUnknown}}<sup>[1]</sup></td>
   <td>{{CompatNo}}<sup>[2]</sup></td>
   <td>{{CompatIE("9.0")}}<sup>[3]</sup></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}<sup>[1]</sup></td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td>constructor</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile("31.0")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.char</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.charCode</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.code</code></td>
   <td colspan="5" rowspan="1">See Browser compatibility of {{domxref("KeyboardEvent.code")}}.</td>
  </tr>
  <tr>
   <td><code>.isComposing</code></td>
   <td>{{CompatNo}}</td>
   <td>{{CompatGeckoMobile("31.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>.key</code></td>
   <td colspan="6">See Browser compatibility table of {{domxref("KeyboardEvent.key")}}.</td>
  </tr>
  <tr>
   <td><code>.keyCode</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.locale</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.location</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile("15.0")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.repeat</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile("28.0")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.which</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
  <tr>
   <td><code>.getModifierState()</code></td>
   <td colspan="5" rowspan="1">See Browser compatibility of {{domxref("KeyboardEvent.getModifierState")}}</td>
  </tr>
  <tr>
   <td><code>.initKeyboardEvent()</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] The arguments of <code>initKeyboardEvent()</code> of WebKit and Blink's are different from the definition in DOM Level 3 Events. The method is: <code>initKeyboardEvent(in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in views::AbstractView viewArg, in DOMString keyIndentifierArg, in number locationArg, in boolean ctrlKeyArg, in boolean altKeyArg, in boolean shiftKeyArg, in boolean metaKeyArg, in boolean altGraphKeyArg)</code></p>

<p>[2] Gecko won't support <code>initKeyboardEvent()</code> because supporting it completely breaks feature detection of web applications. See {{Bug(999645)}}.</p>

<p>[3] The argument of <code>initKeyboardEvent()</code> of IE is different from the definition in DOM Level 3 Events. The method is: <code>initKeyboardEvent(in DOMString typeArg, in boolean canBubbleArg, in boolean cancelableArg, in views::AbstractView viewArg, in DOMString keyArg, in number locationArg, in DOMString modifierListArg, in boolean repeatArt, in DOMString locationArg)</code>. See <a href="http://msdn.microsoft.com/en-us/library/ie/ff975297%28v=vs.85%29.aspx">document of <code>initKeyboardEvent()</code> in MSDN</a>.</p>

<p><a href="http://www.howtocreate.co.uk/tutorials/javascript/domevents#domevld1">[4]</a> Note that manually firing an event does <em>not</em> generate the default action associated with that event. For example, manually firing a key event does not cause that letter to appear in a focused text input. In the case of UI events, this is important for security reasons, as it prevents scripts from simulating user actions that interact with the browser itself.</p>