Automatic scrolling if textbox past height

1

Hello,

I am looking for a way to have my content scroll vertically automatically if it is past a certain height. Can someone please point me in the right direction?

Thanks,
Saveth

 
var my_format1:TextFormat = new TextFormat();
my_format1.font = "EventFont";
my_format1.size = 50;
my_format1.color = 0xFFFFFF;
 
var my_text2:TextField = this.createTextField("my_text2", this.getNextHighestDepth(), 50, 200, 900, 30);
my_text2.variable = "sLine_02";
my_text2.antiAliasType = "normal";
my_text2.wordWrap = true;
my_text2.autoSize = true;
my_text2.embedFonts = true;
my_text2.setTextFormat(my_format1);
my_text2._x = (Stage.width/2)-(my_text2._width/2);
my_text2._y = (my_text3._y + my_text3._height)+20;