I guess you mean Southampton, which is just what I feared!
When you make a post there is a symbol like a paperclip at the top called attachments. Click on it and a second window will open with 10 boxes. Click on 'Browse' and navigate to where you have your photos on your PC and add them, one at a time until you 10. Then click the upload at the bottom right and reduce the box to the taskbar.. Wait some time depending on your connection/photo size until the box pops up again and click 'close window'. You can then post as you did above.