function Post(name, domain, toplevel, showimage) {
if (toplevel==null) toplevel = 'nl';
if (domain==null) domain = 'airvan';
var 
  a = name + '@' + domain + '.' + toplevel;
  h = '<a href="mailto: ' + a +'"';
  i = '><img src="js/email.gif" border="0" style="margin-right: 5px;">';
  f = '<\/a>';  
  if (showimage)
    document.write(h + ' title="' + a + '"' + i + f);
  else
    document.write(h + '>' + a + f);
  return true;
}