moving a slider with the keyboard arrows

moving a slider with the keyboard arrows


hello ui community,
i would like to make my slider movable by the keyboard arrows like
this:
left = left
right = right
up = left edge
down = right edge
i already got the hot keys plugin (http://code.google.com/p/js-
hotkeys/) running.
i am getting the actual position of the slider now but i don't know
how to move it.
$(document).bind('keydown', 'left', function()
{
    var reglerPos = $("#crossfaderHandler").position().left;
     // how to move the crossfader:
     // left position - 10px, or so;
});
also i noticed that it was already possible to move the slider to the
left and to the right (with the arrow keys) if you clicked it before.
i guess this is something the browsers are doing? is it possible to
turn this off (since i am going to replace it with my own
functionality anyway)?
looking forward to reading from you
dirk