http://www.gardenstew.com/threads/how-do-you-copy-a-link-to-post.38222/ Is this what you are trying to do? Highlight the info in the URL bar at the top, right click, click Copy, then put your cursor in the space where you want the link and right click and click Paste
Depending on the web browser you are using, when you right-click on a link in a web page you should see an option to "Copy link location" or something similar. This will copy the link's address which you can then paste while writing your post.