Set IE8 page title with JavaScript to include French HTML entity -

using javascript, how can set page title (so works in ie8) include ᴹᴰ french version of ®? charset utf-8 , cannot changed.

document.title = "bonjour<sup>md</sup>"; //does not work anywhere

document.title = "bonjourᴹᴰ"; //does not work in winxp ie8, shows 2 square characters... when view source