Fixed position sidebar with jQuery

Question

How do I incorporate the following sidebar menu feature using jQuery where the menu on the left re-appears as the user scrolls down the page?

Here's an example sidebar menu .

Answer 1

Jquery CSS Control:

http://css-tricks.com/scrollfollow-sidebar/

and tutorial is also nice,

if you are using bootstrap then you can use affix control of bootstrap, that is also good

Answer 2

There's a really good tutorial over at Nettuts about this exact thing:

Creating a Floating HTML Menu Using jQuery and CSS