Changing default on hover behavoir of image in Firefox

I have an im开发者_C百科age which is disabled, for which, on hover it should be normal 'pointer' and when enabled it be a 'hand' This works fine in IE But in FF the default behavior, on hover is a 'hand', even when the image is disabled. How do i change this?

CSS should do the trick

img {
     cursor:pointer;
}

$('.selector:disabled').live('hover', function() {
    $(this).css('cursor','default');
}
$('.selector').not(':disabled').live('hover', function() {
    $(this).css('cursor', 'pointer');
}

This is a jquery way of doing it.