Entry
How can I capture Alt-key and Ctrl-key combinations?
But how to get 'event.ctrlKey' in Mozilla if I need to pass more parameters like onclickhandl(some i
Apr 16th, 2000 08:18
Martin Honnen, Wim Schuiling, Vladimir Kelman,
IE has the following boolean properties for the window.event object
event.altKey
event.ctrlKey
event.shiftKey
NN6 also has this properties but for the event object passed to the
event handler.
NN4 has some
event.modifiers
bit flag which you can bitwise and with predefined values
Event.CONTROL_MASK
Event.ALT_MASK
Event.SHIFT_MASK
Note that while these flags exists NN4 doesn't seem to set the modifier
for the alt key at all and only restricted for the ctrl key.
Here is a code example, see for yourself which combinations are caught
and which not:
<HTML>
<HEAD>
<SCRIPT>
document.onkeypress = function (evt) {
var r = '';
if (document.all) {
r += event.ctrlKey ? 'Ctrl-' : '';
r += event.altKey ? 'Alt-' : '';
r += event.shiftKey ? 'Shift-' : '';
r += event.keyCode;
}
else if (document.getElementById) {
r += evt.ctrlKey ? 'Ctrl-' : '';
r += evt.altKey ? 'Alt-' : '';
r += evt.shiftKey ? 'Shift-' : '';
r += evt.charCode;
}
else if (document.layers) {
r += evt.modifiers & Event.CONTROL_MASK ? 'Ctrl-' : '';
r += evt.modifiers & Event.ALT_MASK ? 'Alt-' : '';
r += evt.modifiers & Event.SHIFT_MASK ? 'Shift-' : '';
r += evt.which;
}
alert(r);
return true;
}
</SCRIPT>
</HEAD>
<BODY>
</BODY>
</HTML>
