Questo è il codice, l'ho modificato un po' rispetto a prima:
function onHelpScrollChange()
{
var _loc1 = helpinc - bph + 4;
if (_loc1 < 0)
{
_loc1 = 0;
} // end if
bhelpscrollmc.Scr_size = _loc1;
var _loc2 = bhelpscrollmc.Scr_position;
mchelpback._y = -_loc2;
} // End of the function
DialogClose();
DialogOpen = 5;
HelpText = "";
var _loc7 = GetLangDom() + (w_lang == undefined || w_lang == 0 ? ("help") : (String(w_lang) + ".h")) + ".xml?" + w_langv;
loadVariables(_loc7, _root);
_root.depth = _root.depth + l_Diag;
mchelpbackground = new xDialog(NX(20), NY(20), NX(600), NY(440), " " + "Come modificare la tua chat", nd, 0, mchelpbackground_close);
var _loc6 = mchelpbackground.Dia;
_loc6.mcreturn2 = new xBut(NX(240), NY(420), NX(160), NY(30), ST(45), HelpClose);
_loc6.mcreturn2.But._alpha = 90;
var _loc2 = NX(580);
var bph = NY(390) - 40;
var _loc3 = NX(30);
var _loc4 = NY(20) + 40;
mchelpbackb = AddBackground(_loc3, _loc4, _loc2, bph);
mchelpback = mchelpbackb.createEmptyMovieClip("mc" + _root.depth, _root.depth++);
mchelpback.Width = _loc2;
mchelpbackmask = AddBackground(_loc3 + 1, _loc4 + 1, _loc2 - 2 - NX(16), bph - 2, 0);
mchelpback.setMask(mchelpbackmask);
bhelpscrollmc = new xScroll(_loc3 + _loc2 - NX(16), _loc4, NX(16), bph, NX(16), NX(32), 30, 1000, 0, onUserScrollChange);
_root.depth = _root.depth - l_Diag;
if (HelpText != undefined)
{
helpinc = 0;
AddHelpLine ("questo lo voglio in grassetto");
AddHelpLine("questo no");
for (var _loc1 = 0; _loc1 < 500; ++_loc1)
{
index = HelpText.indexOf(";=");
if (index == -1)
{
break;
} // end if
AddHelpLine(HelpText.substr(0, index));
HelpText = HelpText.substr(index + 2);
} // end of for
HelpText = undefined;
} // end if
} // End of the function