ActionScript load extern gif animation into htmlText

I hope this helps you . The htmlText supports only a limited set of tags and styles. Specifically, span supports only a class attribute which should be the name of a class specified in a StyleSheet object.
You can use the font tag in this particular case. But remember that color supports only hexadecimal #ffffff values and size supports only absolute pixel size and relative (+2, -1 etc) size values.

tags.htmlText = "<font color="#a89433" size="10">street</font>,
  <font color="#b37620" size="11">motor</font>";

Does that help I reset defaultTextFormat every time I assign htmlText, nad it fixes it.

Any of those help This thread helped. The trick is to assign a TextFormat instance (with the correct default font) to the defaultTextFormat property of the TextField instace. So the whole code becomes

        var tf : TextField = new TextField();
        tf.selectable = false;
        tf.width = w;
        tf.height = h;

        tf.autoSize = TextFieldAutoSize.LEFT;
        tf.antiAliasType = AntiAliasType.ADVANCED;
        tf.gridFitType = GridFitType.PIXEL;
        tf.wordWrap = true;
        tf.multiline = true;
        tf.embedFonts = true;

        var tff : TextFormat = new TextFormat();
        tff.font = "Myriad Pro";
        tf.defaultTextFormat = tff;

        tf.styleSheet = _styles;

I wish this helpful for you to some suggestions from @s9tpepper and @mike_robbo on twitter I was actually able to use the following code to encode characters the way flash HTML likes it.

        /**
         * Encode HTML.
         */
        public static function htmlEncode(s:String):String
        {
            s = s.replace("&", "&");
            s = s.replace(" ", " ");
            s = s.replace("<", "&lt;");
            s = s.replace(">", "&gt;");
            s = s.replace("™", '&trade;');
            s = s.replace("®", '&reg;');
            s = s.replace("©", '&copy;');
            s = s.replace("€", "&euro;");
            s = s.replace("£", "&pound;");
            s = s.replace("—", "&mdash;");
            s = s.replace("–", "&ndash;");
            s = s.replace("…", "&hellip;");
            s = s.replace("†", "&dagger;");
            s = s.replace("·", "&middot;");
            s = s.replace("µ", "&micro;");
            s = s.replace("«", "&laquo;");
            s = s.replace("»", "&raquo;");
            s = s.replace("•", "&bull;");
            s = s.replace("°", "&deg;");
            s = s.replace('"', "&quot;");
            return s;
        }