[jQuery] datepicker z-index

[jQuery] datepicker z-index

I'm having trouble overriding the default z-index for the datepicker.
Here's the code I have (minus some stuff that doesn't apply to this issue):
    $("#datefield").datepicker({
        beforeShow: function()
        {
            $(this).css("position", "absolute");
            $(this).css("z-index", "3000000000");
            return {};
        }
       });
I've also tried using zIndex instead of z-index since that's how javascript calls it. Any ideas?
--
Adam
"Do one thing, and do it well."
  -- The UNIX Philosophy