GUISkin.verticalScrollbarUpButton 垂直滚动条上按钮

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public float hSbarValue;
	public GUIStyle style;
	void OnGUI() {
		GUI.skin.verticalScrollbarUpButton = style;
		hSbarValue = GUILayout.VerticalScrollbar(hSbarValue, 1.0F, 0.0F, 10.0F);
	}
}

// Modifies only the vertical scrollbar
// up button of the current GUISkin
//修改当前GUISkin垂直滚动条上按钮的样式

var hSbarValue : float;
var style : GUIStyle;

function OnGUI () {
    GUI.skin.verticalScrollbarUpButton = style;
    hSbarValue = GUILayout.VerticalScrollbar (hSbarValue, 1.0, 0.0, 10.0);
}