i have similar problem question
and here's jsfiddle i'm following .
the problem have sticky element should not fixed position default, unlike 1 on jsfiddle.
#thefixed { background-color:red; border: solid; position:fixed; top:250px; }
i want achieve similar effect site . when scroll left side of page fixed , when reaches end of parent element, goes it's original state.
i think scroll magic useful.