stick scroll with columns
<p>I have two columns of dynamic content both overflows the screen.
I need to use the main scroll but when either of them ends, it should remain in the screen and not continue to scroll when the other one keeps scrolling.</p>

<p>I guess i need some jQuery based approach here, but i am not sure what selectors and methods i should use. </p>

<p>I need something that will not be heavy to use. 
appreciate any help.</p>
