Display scroll bar at all times

Is there a way to always display the horizontal scroll bar - even if the number of columns does not exceed the width of the grid?

Yes -

obj.setScrollBars("both");
obj.onScrollBarsChanging = function(){return 1}; //cancel change

http://www.activewidgets.com/javascript.forum.16186.2/how-can-i-disable-scrollbars.html