There are 2 ways to post pictures. You can use the Insert Image button

, which will prompt you for an url. This requires that you have a picture stored some place else, like facebook, photobucket, etc. You would then go to where you have that picture stored and get the url for the picture. This is usually done by right clicking the picture on the website and choosing Properties. This will give you the url. You then copy that url and paste it into the box asking for the url on the forum. This usually the best method as you can post it at different spots in the post like the example below:

The other way is to attach the picture to the post after you have made the post. Once you have made the post. You will see a attach button at the top. Click that and it will ask you to choose one from your computer. You can then browse to it and attach it. It will look like this.
If your picture is over 2.5 Mb, it will just attach the picture instead of showing it in the thread.
Hawk attached the following image(s):

001us_navy_seals_insignia111-vi.png
(124kb) downloaded 6 time(s).You cannot view/download attachments. Try to login or register.