How do I create a form field that users can insert images from the internet?

[Jamesharris90]

I have created some online learning resources but need my pupils to fill an image field with pictures from the web. Using the prepare form tool I have got it that I can create the form and select images that are already stored on their computer but I would like it to be images from the internet.Is this possible?

[try67]

No. The file must be saved locally first.