function showMail(arg1, arg2, arg3, arg4)
{
  var str_out  = (arg4 == 'true') ? "mailto:" : "";
  str_out 		+= arg3 + "@" + arg2 + "." + arg1;

  if (arg4 == 'true')
    document.location = str_out;
  else
  	document.write(str_out);
}