Question regarding menus

…I have only my own limited knowledge of actionscript to blame for this, but:

I have a menu setup vertically on my main stage (so that the buttons are arranged in the same such fashion as items on a shopping list). Anyways, what I want is for a semi-transparent bar to follow the mouse vertically whenever you rollover the buttons.

I tried using the startDrag command as a starting point, but I am unable to click on the buttons when I run the swf. And instead of causing the bar to move from the previous button to the current button on rollOver, it merely follows the mouse until it hits the top and bottom of my bounding box.

I would greatly appreciate any help on this matter.