How to Upload a Picture in a Comment on Facebook
Among many things, Facebook acts as a photo sharing website. Anyone with a Facebook account can post photo albums with dates and captions, view and comment on photos posted by friends, and tag friends in photos so they appear on their profiles. Photos can also be posted on a friend's Wall with an optional accompanying caption or comment.
Sign-in to your Facebook account.
Type your friend's name into the "Search" box at the top of the page.
Click on your friend's name from the result's list to access her profile.
Type your comment into the "Write something" box at the top of your friend's profile page.
Click on the "Photo" button, located directly above the "Write something" box.
Click on "Upload a Photo" from the drop-down menu.
Click on the "Browse" button in the dialogue box.
Locate the image you want to post using the dialogue box to search through your computer's files.
Double-click on the name of the photo to select it, or click on it once, then click on the "Open" button, located at the bottom-right of the screen.
Click on the "Share" button to post your comment and photo to your friend's wall.