Embedd Graphics in Forms/Fields

Hi, does anybody know a Formula or Script to embedd a graphic (or other web elements) from an external web page?

What I want to do is this:

I’m designing a Form with specific country information. What I would like is, if somebody creates a new country document and selects e.g. Australia, a formula automatically get’s the picture of the falg and the map from an internet URL and put’s it in the respective rich text field.

Thx for your help