https://www.thesettlersonline.com/sites/default/themes/common/js/external/string.utf8.js

1/*
2---
3description: String UTF8 encoding.
4license: MIT-style
5authors: [Christopher Pitt]
6provides: [String.toUTF8]
7requires: 
8  core/1.2.4: [String]
9...
10*/
11
12(function() {
13
14	function utf8(string)
15	{
16		var a, b, result = '',
17		from = String.fromCharCode;
18
19		for (a = 0; b = string.charCodeAt(a); a++)
20		{
21			if (b < 128)
22			{
23				result += from(b);
24			}
25			else if ((b > 127) && (b < 2048))
26			{
27				result += from((b >> 6) | 192);
28				result += from((b & 63) | 128);
29			}
30			else
31			{
32				result += from((b >> 12) | 224);
33				result += from(((b >> 6) & 63) | 128);
34				result += from((b & 63) | 128);
35			}
36		}
37
38		return result;
39	}
40
41	String.implement({
42		'toUTF8': function()
43		{
44			return utf8(this);
45		}
46	});
47
48})();