onKeyUp and OnKeyDown

[linuxdude]

what is the difference between onKeyup and OnKeydown and onChange and why doesn't onChange work?

[ConfusedOfLife]

onkeyup is triggered when you release a key.
onkeydown is activated when you press a key!
and finally onchange doesn't have anything to do with any kind of key! whenever a field ( i.e. text, checkbox, radiobutton, ...) is changed, it get's activated!

And I think you should be more specific and send your code that I can say why it doesn't work!