How to group a text frame to graphic frame trough scripting?

I'm using LabelGraphics.jsx (modified) but I would like to add one more feature to the scripting. The script add a text frame to the graphics selected, but I need most of the time group the text frame to the graphic. How to do that? Maybe I can add a check box to dialog box in order to group.

I'm just starting to learn scripting.

Thanks.