I am very new to InfoPath

I have created a very simple a form for testing purpose. I have been tiring to duplicate a template I seen in a home made training video. When viewing the demonstration the author created a form with lots of data. When the author got to the bottom of the form there were three buttons. (Save] - Open - New)

When the author clicked on the save button a “script prompt” box open. The script prompt said “Form Name to Be Saved” when he entered his name the form he just filled out was saved with the name he entered in that prompt box.

I have tried everything I could to duplicate that could but still no luck.

My Question:
How do I go about creating an InfoPath Template that contains a button within the form that when clicked will prompt me to enter a name save the form as. What I can tell you is the script prompt looked like a JavaScript prompt.

I would be very appreciative to anyone who could show me how to do this.

Thank you for your time