window.onload = function() {
  settings = {
	  tl: { radius: 20 },
	  tr: { radius: 20 },
	  bl: { radius: 20 },
	  br: { radius: 20 },
	  antiAlias: true,
	  autoPad: true,
	  validTags: ["div"]
  }

  var myBoxObject = new curvyCorners(settings, "mainPageBody");
  myBoxObject.applyCornersToAll();
}