if the type of member (the member of sprite 41) = #digitalVideo then
put (the width of sprite vSliderSpriteNum)/2 into vOffset
set vPositionRatio = (the duration of member (the member of sprite 41))/((the width of sprite vTrackSpriteNum)-(the width of sprite vSliderSpriteNum))*1.0
set the locH of sprite vSliderSpriteNum = (the left of sprite vTrackSpriteNum + vOffset) + ((the movieTime of sprite 41)/vPositionRatio)