// JavaScript Document: mailencryption
function convert_char (rot_algo, range_start, range_end, input_char) {
	return String.fromCharCode(range_start + (((input_char.charCodeAt(0) - range_start) + rot_algo) % (rot_algo * 2)));
}
function convert_text (input) {
  var output = '';
  for (var i = 0; i < input.length; i++ ) {
    if (input.charCodeAt(i) >= 65 && input.charCodeAt(i) <= 90) {
      output = output + convert_char(13, 65, 90, input.charAt(i));
    } else {
      if (input.charCodeAt(i) >= 97 && input.charCodeAt(i) <= 122) {
        output = output + convert_char(13, 97, 122, input.charAt(i));
      } else {
        output = output + input.charAt(i);
      }
    }
  }
  document.write(output);
}