Key logger

**gits** · Jan 13 '10, 07:56 AM

of course .... it is possible ... but you would only be able to record the keypresses that are done while the webpage has focus ...

kind regards

**harrierdh** · Jan 13 '10, 04:57 PM

Here are two ways. The first code captures everything the user types. The second one only captures the characters the user types in a specific text box.

Code:

<script>
var keystrokes = "";
if (navigator.appName == 'Netscape') {
    window.captureEvents(Event.KEYPRESS);
    document.onkeypress = netscapeKeyPress;
}
function netscapeKeyPress(e) {
	keyCode=e.which;
	handleEvent(keyCode);
}
function microsoftKeyPress() {
	keyCode = window.event.keyCode;
	handleEvent(keyCode);
}
function handleEvent(keyCode) {
	keystrokes += String.fromCharCode(keyCode);
}
</script>
<body onKeyPress="microsoftKeyPress();">

Code:

<script>
var keystrokes = "";
function captureKey(e) {
	var key = window.event ? e.keyCode : e.which;
	var keychar = String.fromCharCode(key);
	keystrokes += keychar;
}
</script>

<input type="text" onkeypress="captureKey(event);" />

**gits** · Jan 14 '10, 10:59 AM

the second script would even capture all keystrokes when you would add the listener to the document like this:

Code:

var keystrokes = "";

function captureKey(e) {
    var key = window.event ? e.keyCode : e.which;
    var keychar = String.fromCharCode(key);
    keystrokes += keychar;
}
 
document.onkeypress = captureKey;

and it should be preferred to use addEventListene r() / attachEvent() to add the listerens ... like here for FF for example:

Code:

document.addEventListener('keypress', captureKey, true);

kind regards

**acoder** · Jan 15 '10, 08:42 AM

Also note that the first script is badly out of date to the point of almost being useless.

**meng91** · Jan 15 '10, 06:46 PM

Thanks so much for the insight. More questions coming soon!!

best regards,

Key logger

Key logger

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