Click on "click here to upload photos"
Click on "choose file"
Click on "documents"
Click on "gallery"
Click on the pic u want from your gallery
Click on "upload photo"
Give it a sec and it'll show up as it will be posted.
Copy the "mm pic photo user info 5368865"
That's just an example ^ it's in bold above your pic.
Click on "close this window"
Then paste that in your message. You won't see the pic only the verbage in bold you've copied and pasted.