JS: вращающаяся фотография при наведении

initPhotoHover.js

function initPhotoHover(){
    var avatar = $(".photo");
    var cycleTimer = "";

    function cyclePhoto(photo){
        var position = photo.css('background-position').split(' ');
        if (parseInt(position[1],10) == -photo.outerWidth()*7) { photo.css('background-position', '0 0'); }
        else { photo.css('background-position', position[0] + ' ' + (parseInt(position[1],10) - photo.outerWidth()) + 'px'); }
    }

    $.each(avatar, function(){
        var photo = $(this);
        photo.on("mouseover", function(){ cycleTimer = setInterval(function(){ cyclePhoto(photo); }, 100); });
        photo.on("mouseleave", function(){ clearInterval(cycleTimer); });
    });
}

$(document).ready(function(){ initPhotoHover(); });