function openWindow(href, title, scroll, resizable, width, height, position)
{
  if(scroll != "yes")
  {
    scroll = "no";
  }

  if(resizable != "yes")
  {
    resizable = "no";
  }

  if(position != 'center')
  {
    xx = window.open(href, title, 'toolbar=no, scrollbars=' + scroll + ', menubar=no, directories=no, status=no, resizable=' + resizable + ', width=' + width + ', height=' + height);
  }
  else
  {
    this_top = (screen.height - height) / 2;
    this_left = (screen.width - width) / 2;
    xx = window.open(href, title, 'toolbar=no, scrollbars=' + scroll + ', menubar=no, directories=no, status=no, resizable=' + resizable + ', width=' + width + ', height=' + height + ', top=' + this_top + ', left=' + this_left);
  }

  xx.focus();

  return false;
}