Style used by default for the up button on GUI.VerticalScrollbar controls.
// Modifies only the vertical scrollbar
// up button of the current GUISkin
var hSbarValue : float;
var style : GUIStyle;
function OnGUI () {
GUI.skin.verticalScrollbarUpButton = style;
hSbarValue = GUILayout.VerticalScrollbar (hSbarValue, 1.0, 0.0, 10.0);
}