I need to animate a background image and am using the code
        $('div.holder-inner').css({backgroundPosition: '0px 0px'});
    $('#up').click(function(){
        // alert('!');
        $('div.holder-inner').animate({
            backgroundPosition: '200px 10px'
        });
    });
Which fails to work.. it does however work if I amend the backgroundPosition to only contain one value rather than two like so
            backgroundPosition: '200px'
Tested in firefox 6 and chrome - and produces the same result in both - animates with a single value and does nothing with two values.
Any ideas?
 
    