how is Scrollbar item focus ???

[star9565]

public void OnclickFocusItem(GameObject go)
{
   float MaxItem = 13;
   int intMaxItem = (int)MaxItem;
   float FocusItem = Random.Range(0,intMaxItem);
   float s_value = FocusItem/MaxItem;
      
   UIScrollBar scrollbar = GameObject.Find("UIPanel (Scroll Bar)").GetComponent<UIScrollBar>()as UIScrollBar;
   scrollbar.scrollValue = s_value;   
      
   print("focus item = "+ FocusItem);
}

i want  scroll bar position focus FocusItem position in center!

 item 10 focus , item 5 focus , 

plz Help!!!!!!!!!!!!!!!