Nadeemjp, the Articles forum also has articles on just how to add links to the navbar. It's a very helpful forum. That being said, here is the area in a default navbar around the calendar area with a new link added in red (change "yourpage.php" and "Your Page" to whatever you want):
Buster, you may want to look over that article just to see what the basic premise is for making a drop-down. I can't write out the code for you since there is no drop-down called "Menu" for me to add a link to. You would be adding to the navbar template down near the bottom where all the PAGENAV POPUP stuff is.