Using VBA to upload image to website

Hi I am writing a VBa script to post ad to website https://my.gumtree.com
Now I am facing problem when writing script to upload image to website.
I would like to write a script to upload image to this website. These images are in my local directory and their names are defined in excel file (cell J2:J5)
This button in this website using flash so it make me hard.

I attached the file pls take a look.

I appreciate for your help!

Any one has any idea ?