function changerTaillePolice(taille) {
	var COOKIE_VAR = "OSU_style";
	var INDICE_MIN = 0;
	var INDICE_MAX = 2;

	var indice_old = INDICE_MIN;

	if(document.cookie.length > 0 && document.cookie.indexOf(COOKIE_VAR) >= 0)
		indice_old = parseInt(document.cookie.substr(document.cookie.indexOf(COOKIE_VAR) + COOKIE_VAR.length + 1, 1));

	var indice_new = Math.max(INDICE_MIN, Math.min(indice_old + taille, INDICE_MAX));

	if(taille == 0 || indice_old != indice_new) {
		document.getElementsByTagName("link")[indice_old].disabled = true;
		document.getElementsByTagName("link")[indice_new].disabled = false;

		document.cookie = COOKIE_VAR + "=" + indice_new + "; path=/";
	}

	return true;
}