Copy and paste the URL from your browser address bar. To make it one another tab when clicked (helpful)' stick at the front and at the end, kind of like posting pics.
There is also a URL button at the top of the text box if you are starting a new thread, or if you press 'Reply' or 'Quote' - you select the pasted link and then press the button, it puts the markers on each end for you.
This thread should be moved to forum discussion I think...