I am trying to capture the keyCode on the KeyPress Event client side.
If I use

function IgnoreEnter(keyCode) {
    if (event.keyCode == 13) {
        event.returnValue = false
        event.cancel = true
        return true
    }
    else {
        return false
    }
}

it is not capturing the keycode event.  I need to pass the event, which I am not sure how to do that. 
Using <ClientSideEvents KeyPress="IgnoreEnter"  KeyDown= "IgnoreEnter"/> does not capture the event in Firefox.  How do I capture the event?

Thanks.