var res1 = currentDocument.getItemValueString("TimezoneText").split("$");
var TZcode = res1[0].split("=");
var tc = "Etc/GMT";
if( TZcode[1] > 0 ) {
tc = tc + "+" + TZcode[1];
} else {
tc = tc + TZcode[1];
}
var tz = TimeZone.getTimeZone( tc );
var texte = TimeZone.getAvailableIDs(tz.getRawOffset()).join("\r\n<li>");
tc + " > <b>" + tz.getDisplayName(true, TimeZone.LONG) +
"</b> -- Pick a name for the offset:\n<ul><li>" + texte + "</ul>";