function OpenMailToFriend(id) {
  var w = 400;
  var h = 350;
  var padding;
  if (navigator.appName == "Microsoft Internet Explorer") {
	  padding = 10;
  }
  else {
	  padding = 0;
  }
  var screenw = screen.availWidth;
  var screenh = screen.availHeight;
  var winw = (w + 15 + padding);
  var winh = (h + 15 + padding);
  var posx = (screenw / 2) - (winw / 2);
  var posy = (screenh / 2) - (winh / 2);
  var param = "top="+posy+", left="+posx+", width="+winw+", height="+winh+", menubar=no";
  window.open("http://tools.werbewind.de/mailtofriend/index.php?id="+id, "MailToFriend", param);
}