Posting Pics, how do you get rid of the popup

I'm posting pictures via the "Host an Image" link and after I get the picture uploaded and the link copied there is no way to close the popup. Any ideas why?

You click the "host it" at the bottom of the popup after getting the picture loaded. Then you highlight the bottom link - and right click over the highlighted link. Then you click on the box next to the one you used to load the pic.... right click over the blank line and your link should be there. Then click OK. link should appear in your message, and the box should disappear. If it is still there, go over the pictorial instructions to be sure you haven't missed a step.

Tater