http://tinypic.com/
What's the problem?
1) Click on browse to select the image, then set the file type (defaults to image), you don't need to bother with the resize option, and finally click the UPLOAD NOW! button.
2) It will then show a small pop-up window into which you type the words displayed and click the UPLOAD NOW! button displayed there.
3) When it has finished uploading, click on Direct Link For Layouts to highlight that URL and use Ctrl-C to copy it onto the clipboard. You can then paste that link by using Ctrl-V wherever you want - if on AB then paste it into the answer box along with any text that you type (and not the Enter Youtube Link Here... box because the link won't be displayed properly)