event Properties   DHTML Events

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Sets or retrieves the Unicode key code associated with the key that caused the event.

HTML	N/A
Script	event.keyCode [ = sKeyCode ]

sKeyCode

String containing the Unicode key code.

The property is read/write with no default value.

The property is intended to be used with the onkeydown, onkeyup, and onkeypress events.

The property's value is 0 ( zero ) if no key caused the event.

The below code shows a cross-browser method for capturing the onkeydown event at the document level and identifying all the Unicode values of a standard US-English keyboard. Note that Netscape^® 4 does not return key codes with certain keys.

<script language="JavaScript">
<!--
document.onkeydown = function ( evt ) {
var keyCode = document.all ? event.keyCode : 
   document.getElementById ? evt.keyCode : 
   document.layers ? evt.which : 0;
   alert ( keyCode );
   return false;
}
//-->
</script>

To test, press any key to get its correspondng keyCode.

event

charCodeAt, Key Capture Routines