$(function() {
    var w = 224, h = 140;
    $('#portfolio img.alt').css({width: w * 2, height: h * 2, left: - w / 2, top: - h / 2, opacity: 0, display: 'block'});
    $('#portfolio a.thumb').hover(function() {
      $('img.alt', this).stop().animate({width: w, height: h, opacity: 1, left: 0, top: 0});
    }, function() {
      $('img.alt', this).stop().animate({width: w * 2, height: h * 2, left: - w / 2, top: - h / 2, opacity: 0});
    });
  });