Entry
How can I set an inactivity timer?
Apr 7th, 2000 15:17
Martin Honnen,
The following contains code which checks for mousemove and keyup events
as user activity. Note that for NN4 that might not suffice to capture
all user activity (for instance when a select has focus key events
don't fire in NN4) but relevant activity should be caught. IE4+ and NN6
should do fine.
<HTML>
<HEAD>
<SCRIPT>
var tid, time, action;
var message1 = 'You are getting lazy. No activity for ';
var message2 = ' seconds.';
function setInactivityTimer (time, action, repeat) {
window.time = time;
window.action = action;
window.repeat = repeat;
if (tid)
clearTimeout(tid);
if (document.layers)
document.captureEvents(Event.MOUSEMOVE | Event.KEYUP);
document.onmousemove = document.onkeyup =
function (evt) {
setInactivityTimer(window.time, window.action, window.repeat);
return true;
};
if (repeat)
action += '; setInactivityTimer('
+ time + ', "' + action + '", ' + repeat + ');';
else
action += '; clearEvents();';
tid = setTimeout(action, time);
}
function clearEvents() {
if (document.layers)
document.releaseEvents(Event.MOUSEMOVE | Event.KEYUP);
document.onmousemove = document.onkeyup = null;
}
</SCRIPT>
</HEAD>
<BODY ONLOAD="setInactivityTimer (30000,
'alert(message1 + (time / 1000) + message2);', true);"
>
</BODY>
</HTML>
