window.onload = function()
{
  settings = {
    tl: { radius: 10 },
    tr: { radius: 10 },
    bl: false,
    br: false,
    antiAlias: true,
    autoPad: false
  }
  var divObj = document.getElementById("caja");
  var cornersObj = new curvyCorners(settings, divObj);
  cornersObj.applyCornersToAll();
}