Hi Alex,

AG> Alternatively, the developer can place escape codes (character
AG> codes) in the web page, which will be by the browser. These are
AG> of the form ampersand, pound, number code, semi-colon. &#XXXX;
AG> (or & # XXXX ; with no spaces).

I currently use on some pages the codes:

AA - Ā aa - ā
II - Ī ii - ī
UU - Ū uu - ū
.M (Ṃ) - Ṃ .m (ṃ) - ṃ
'N (Ṅ) - Ń 'n (ṅ) - ń
~N - Ñ ~n - ñ
.T (Ṭ) - Ṭ .t (ṭ) - ţ
.D (Ḍ) - Ḍ .d (ḍ) - ḍ
.N (Ṇ) - Ṇ .n (ṇ) - ṇ
.L (Ḷ) - Ḷ .l (ḷ) - ļ
.R (Ṛ) - Ṛ .r (ṛ) - ŗ
.C - Ç .c - ç
'S (Ṡ) - Ś 's (ṡ) - ś
.S (Ṣ) - Ṣ .s (ṣ) - ṣ
.H (Ḥ) - Ḥ .h (ḥ) - ḥ

Best regards,
Dimitry