flash actionscript: Here's the problem:
I have a dynamic text field with a text format that's not uniform. How can I
add new text without loosing its previous format? I can't work it out without
using html. I need some help.

No, it should'nt reformat it, but when format is not uniform it does.
Here's an example:

myText.html=false;
myText.text = "ABCDEFGHIJKLMNOPQRSTUVWXZ";
myTextFormat = new TextFormat();
myTextFormat.bold = true;
myText.setTextFormat(1,15,myTextFormat);
myText.text += "0123456789"; / At this point the previous format is lost.

Here's an ugly way of doing it but the only way without reformatting the field.
Once you add text, any formatting that was applied with setTextFormat is
destroyed.

myTextFormat = new TextFormat();
myTextFormat.bold = true;

myText.text = "ABCDEFGHIJKLMNOPQRSTUVWXZ";
myText.setTextFormat(0,15,myTextFormat);

Selection.setFocus(myText);
Selection.setSelection(myText.length,myText.length);
myText.replaceSel("0123456789");