Navbar peekaboo: Hide and make it appear on hover

This tutorial will show you how to make Blogger navbar invisible and have it reappear when you mouse over the top of your blog. The end result of this hack is slightly is different from other navbar peek-a-boo hacks available on the net. Most hacks will: Hide the navbar, but leave it’s footprint visible in normal view, or Look good during normal view, but push the rest of you blog page