dragable style with delayed call

Hello,

i use dragable style for a textfield like this :

style="dragable"
onDragStart="trace(I started being dragged);"
onDrag="trace(I am constantly being dragged and this is fired while dragging);"
onDragEnd="delayedcall(5, action(reset_textfield_infos_placement););"

i want the textfield replace itself in initial position after user stop draging it,
but i want the delayed call canceled and reset to 0 if user drag again the textfield,
in case a long text, user drag a little, read, drag again, read and ...

but with my code, the 5 sec. delay occurs after the first dragEnd, not the last,
how to setup a flag to avoid that ?

Thanks

Davx