[jQuery] My code which use keydown(fn) don't work on IE?? help

[jQuery] My code which use keydown(fn) don't work on IE?? help


$(window).keydown(function(e){
if (e.keyCode == 13)
sendmsg();
});
$(window).keydown(function(ke){
    switch (ke.keyCode)
        {
        case 13:
            alert('enter');
            sendmsg();
            break;
        }
});
They work well on firefox and chrome
but It is not work on IE7.0 ?