addEvent(window, 'load', initCorners);

  function initCorners() {
    var settings = {
      tl: { radius: 20 },
      tr: { radius: 20 },
      bl: { radius: 20 },
      br: { radius: 20 },
      antiAlias: true
    }

    curvyCorners(settings, "#center");
    curvyCorners(settings, "#leftTop");
    curvyCorners(settings, "#leftBottom");
  }