Flash 8 Creating dynamic text field with border

Hi
I am new to Action Script and trying to create a text field runtime as below.

var txtField = createTextField(“aTextField”, 1, 15, 200, 60, 21);
txtField.border = true.

What I am after is to have different border like a raised bevel border or lower bevel border and not a line border. Any help is much appreciated.

Many Thanks in advance.
Bhanu