onkeypress event (Internet Explorer)

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onkeypress event

[This documentation is preliminary and is subject to change.]

Fires when the user presses an alphanumeric key.

Syntax

HTML Attribute	<element onkeypress = "handler(event)">
Event Property	object.onkeypress = handler;
attachEvent Method	object.attachEvent("onkeypress", handler)
addEventListener Method	object.addEventListener("keypress", handler, useCapture)

Standards information

HTML 4.01 Specification, Section 18.2.3

Event information

Synchronous	No
Bubbles	No
Cancelable	No

Event handler parameters

pEvtObj [in]: Type: IHTMLEventObj

Remarks

As of Microsoft Internet Explorer 4.0, the onkeypress event fires and can be canceled for the following keys:

Letters: A - Z (uppercase and lowercase)
Numerals: 0 - 9
Symbols: ! @ # $ % ^ & * ( ) _ - + = < [ ] { } , . / ? \ | ' ` " ~
System: ESC, SPACEBAR, ENTER

Returns a number specifying the Unicode value of the key that was pressed.

To invoke this event, do one of the following:

Press any alphanumeric keyboard key.

The pEvtObj parameter is required for the following interfaces:

HTMLAnchorEvents2
HTMLAreaEvents2
HTMLButtonElementEvents2
HTMLControlElementEvents2
HTMLDocumentEvents2
HTMLElementEvents2
HTMLFormElementEvents2
HTMLImgEvents2
HTMLFrameSiteEvents2
HTMLInputFileElementEvents2
HTMLInputImageEvents2
HTMLInputTextElementEvents2
HTMLLabelEvents2
HTMLLinkElementEvents2
HTMLMapEvents2
HTMLMarqueeElementEvents2
HTMLObjectElementEvents2
HTMLOptionButtonElementEvents2
HTMLScriptEvents2
HTMLSelectElementEvents2
HTMLStyleElementEvents2
HTMLTableEvents2
HTMLTextContainerEvents2
HTMLWindowEvents2
HTMLWindowEvents4

Examples

This example shows how to retrieve information from the shiftKeyshiftKey property of the event object. When the user simultaneously presses the shift key and types a character in the first text field, the value "true" appears in the second text field.

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/onkeypressEX.htm


<head>
<script type="text/javascript">
function checkKey()
{
if (window.event.shiftKey)  // checks whether the SHIFT key 
						    // is pressed
   {
   txtOutput.value = "true"; // returns TRUE if SHIFT is pressed 
						     // when the event fires
   }
}
</script>
</head>
<body>
<p>Press the SHIFT key while pressing another key.<br>
    <input type="text" name="txtEnterValue" onkeypress="checkKey()"> </p>
<p>Indicates &quot;true&quot; if the shift key is used.<br>
    <input type="text" name="txtOutput"> </p>
</body>