FindChild

public static GameObject FindChild(Transform trans , string childName)
	{
		Transform child = trans.Find(childName);
		if (child != null)
		{
			return child.gameObject;
		}
		int count = trans.childCount;
		GameObject go = null;
		for(int i = 0 ; i < count ; ++i)
		{
			child = trans.GetChild(i);
			go = FindChild(child, childName);
			if (go != null)
				return go;
		}
		return null;
	}
	public static T FindChild<T>(Transform trans, string childName) where T : Component
	{
		GameObject go = FindChild(trans,childName);
		if(go == null)
			return null;
		return go.GetComponent<T>();
	}