Scrolling for multiple div

I want to make 2 scrollable element (<div id = "one"> </ div> and <div id = "two">). If you make $ ( "# one, #two").SmoothWheel () ; , the "one" is scrolled only element .

if done consistently first $ ( "# one) .SmoothWheel (); and then $ (" #two ") SmoothWheel ();., the result is scrolled only <div id =" two ">

How to make a scrollable two elements (div#one and div#two) together ?
