function displayPopup(url, height, width, name) {
  properties = "toolbar=0,location=0,resizable=yes,scrollbars=yes,height=" + height;
  properties = properties + ",width=" + width;
  properties = properties + ",left=0,top=0";
  popupHandle = open(url, name, properties);
}

function closewindow() {
    window.close();
}