addEvent(window,'load',function() {
  var settings1 = {tl: { radius: 0 }, tr: { radius: 20 }, bl: { radius: 20 }, br: { radius: 0 }, antiAlias: true };
  var settings2 = {tl: { radius: 20 }, tr: { radius: 0 }, bl: { radius: 0 }, br: { radius: 20 }, antiAlias: true };
  curvyCorners(settings1, "#ccBox1");
  curvyCorners(settings2, "#ccBox2");
  curvyCorners(settings2, "#ccBox3");
  curvyCorners(settings1, "#ccBox4");
  curvyCorners(settings1, "#ccBoxLeft");
  curvyCorners(settings2, "#ccBoxRight");
 });