how to make the sidebar sticky when it ends in my website http://www.infysim.org

Hi Guys,

I am looking for a solution to the following problem:

I want to make the sidebar on my website www.infysim.org not to scroll when it ends.

In some of the pages or in the homepage itself  the main page of the body scrolls down where else the sidebar ends in between.

So I want to make it sticky when the sidebar content ends.

Any help will be really appreciated.

Thanks,

shibaa987