Generate the tk for signing the google translate payload

generateTK.js

var generateTK = (function () {
	function b(a, b) {
		for (var d = 0; d < b.length - 2; d += 3) {
			var c = b.charAt(d + 2),
				c = 'a' <= c ? c.charCodeAt(0) - 87 : Number(c),
				c = '+' == b.charAt(d + 1) ? a >>> c : a << c;

			a = '+' == b.charAt(d) ? a + c & 4294967295 : a ^ c;
		}

		return a
	}

	function tk(a) {
		for (var e = [406398,2087938574], h = Number(e[0]) || 0, g = [], d = 0, f = 0; f < a.length; f++) {
			var c = a.charCodeAt(f);
			128 > c ? g[d++] = c : (2048 > c ? g[d++] = c >> 6 | 192 : (55296 == (c & 64512) && f + 1 < a.length && 56320 == (a.charCodeAt(f + 1) & 64512) ? (c = 65536 + ((c & 1023) << 10) + (a.charCodeAt(++f) & 1023), g[d++] = c >> 18 | 240, g[d++] = c >> 12 & 63 | 128) : g[d++] = c >> 12 | 224, g[d++] = c >> 6 & 63 | 128), g[d++] = c & 63 | 128)
		}
		a = h;
		for (d = 0; d < g.length; d++) a += g[d], a = b(a, '+-a^+6');
		a = b(a, '+-3^+b+-f');
		a ^= Number(e[1]) || 0;
		0 > a && (a = (a & 2147483647) + 2147483648);
		a %= 1E6;
		return a.toString() + '.' + (a ^ h)
	}

	return function (string) {
		return tk(string);
	}
})();