Tryit Editor v1.7

Source Code:

Result:

<!DOCTYPE html>
<html>
<head>
<script>
function displayResult()
{
var x;
if(window.event) // IE8 and earlier
	{
	x=event.keyCode;
	}
else if(event.which) // IE9/Firefox/Chrome/Opera/Safari
	{
	x=event.which;
	}
var keychar=String.fromCharCode(x);
alert("Key " + keychar + " was pressed down");
}
</script>
</head>
<body>

<p>A function is triggered when the user is pressing a key in the input field. The function alerts the key pressed.</p>

<input type="text" onkeydown="displayResult()">

</body>
</html>

Edit the code above and click "Submit Code" to see the result.

W3Schools.com - Try it yourself

Source Code:	Result:
<!DOCTYPE html> <html> <head> <script> function displayResult() { var x; if(window.event) // IE8 and earlier { x=event.keyCode; } else if(event.which) // IE9/Firefox/Chrome/Opera/Safari { x=event.which; } var keychar=String.fromCharCode(x); alert("Key " + keychar + " was pressed down"); } </script> </head> <body> <p>A function is triggered when the user is pressing a key in the input field. The function alerts the key pressed.</p> <input type="text" onkeydown="displayResult()"> </body> </html>
Edit the code above and click "Submit Code" to see the result.	W3Schools.com - Try it yourself