function closeWin() {

  var para = document.createElement("p");
  para.setAttribute("class", "small");
  para.setAttribute("className", "small");

  var link = document.createElement("a");
  link.setAttribute("class", "nochange");
  link.setAttribute("className", "nochange");
  link.setAttribute("href","javascript:window.close()");
  link.appendChild(document.createTextNode("Close this window"));

  para.appendChild(link);
  document.body.appendChild(para);
}
window.onload = closeWin;