hola, aunque es un post bastante viejo, dejo la respuesta para gente que, como yo, que puede andar buscando la solucion hoy en dia.
aca dejo un script que encontre en una pag que sirve para capturar el codigo de todas las teclas,
Saludos,
Fernando
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>JavaScript Event KeyCode Test Page</title>
<SCRIPT type="text/javascript">
focusInput = function()
{
document.getElementById("input").focus();
};
clear = function()
{
var eventTypes = ["onkeydown", "onkeypress", "onkeyup"];
var codeTypes = ["keycode", "charcode", "which"];
for(var event = 0; event < eventTypes.length; event++)
{
for(var code = 0; code < codeTypes.length; code++)
{
var element = document.getElementById(eventTypes[event] + "_" + codeTypes[code]);
while (element.firstChild != null)
{
element.removeChild(element.firstChild);
}
}
}
};
processKeyEvent = function(eventType, event)
{
// MSIE hack
if (window.event)
{
event = window.event;
}
var element = document.getElementById(eventType + "_keycode");
var text = document.createTextNode("'" + event.keyCode + "'");
element.appendChild(text);
element = document.getElementById(eventType + "_charcode");
text = document.createTextNode("'" + event.charCode + "'");
element.appendChild(text);
element = document.getElementById(eventType + "_which");
text = document.createTextNode("'" + event.which + "'");
element.appendChild(text);
};
processKeyDown = function(event)
{
clear();
processKeyEvent("onkeydown", event);
};
processKeyPress = function(event)
{
processKeyEvent("onkeypress", event);
};
processKeyUp = function(event)
{
processKeyEvent("onkeyup", event);
};
</SCRIPT>
</head>
<body>
<h1>JavaScript Event KeyCode Test Page</h1>
<P>Input: <INPUT id="input" type="text" value=""/></P>
<TABLE border="1">
<THEAD>
<TR>
<TH></TH>
<TH>onKeyDown</TH>
<TH>onKeyPress</TH>
<TH>onKeyUp</TH>
</TR>
</THEAD>
<TR>
<TH>event.keyCode</TH>
<TD id="onkeydown_keycode"></TD>
<TD id="onkeypress_keycode"></TD>
<TD id="onkeyup_keycode"></TD>
</TR>
<TR>
<TH>event.charCode</TH>
<TD id="onkeydown_charcode"></TD>
<TD id="onkeypress_charcode"></TD>
<TD id="onkeyup_charcode"></TD>
</TR>
<TR>
<TH>event.which</TH>
<TD id="onkeydown_which"></TD>
<TD id="onkeypress_which"></TD>
<TD id="onkeyup_which"></TD>
</TR>
</TABLE>
<H4>Notable Gotchas</H4>
<UL>
<LI>Firefox and onKeyDown vs. onKeyPressed</LI>
<LI>Firefox and keyCode vs. charCode</LI>
<LI>Enter key and onKeyPress on Firefox vs. IE</LI>
</UL>
<SCRIPT>
window.onload=focusInput;
document.getElementById("input").onkeydown=processKeyDown;
document.getElementById("input").onkeypress=processKeyPress;
document.getElementById("input").onkeyup=processKeyUp;
</SCRIPT>
</body>
</html>
