listbox with scroll bar problem

I have one listbox and i have set one model as arraylist(list) to that listbox

I have kept one delete image in each row of that listbox.
And onclicking of that image I want to remove that listitem from that listbox.
Now the problem is if the listbox has say three items and I'm deleting from the last item.
What i see is when the last item remains then the scroll bar comes in that listbox.
It's consistently happening in IE but sometime in Mozila. I have tried different way to delete item
on clicking the listitem those are:
1) I have removed that corresponding object from the arraylist and called that binder.loadAll() method.
2) I have detached that item from the listbox.
3) I have made that item invisible.
But it fails to remove the scroll bar when it reaches to a single listitem.
Interesting point is if start deleting the item from the 0 the listitem then that doesn't happen.
plz help.