var newWindow = null;
function openWindow(mypage, w, h, scrollbar, pos) {
  if (scrollbar == '1') {
    scrollbar = "yes";
  } else {
    scrollbar = "no";
  }
  if (pos == "center") {
    myleft = (screen.width) ? (screen.width-w)/2 : 100;
    mytop = (screen.height) ? (screen.height-h)/2 : 100;
  } else {
    myleft = 0;
    mytop = 0;
  }
  settings = "width=" + w + ",height=" + h + ",top=" + mytop + ",left=" + myleft + ",scrollbars=" + scrollbar + ",location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no";
  newWindow = window.open(mypage, '', settings);
  newWindow.focus();
}

function showEmailToFriend() {
  var objEmailToFriend = document.getElementById('emailtofriend');
  var changeStyle = (objEmailToFriend.style.display == 'none') ? 'block' : 'none';

  objEmailToFriend.style.display = changeStyle;
  return false;

}