Rollover("button01", "img/menu_01a.gif");
	Rollover("button02", "img/menu_02a.gif");
	Rollover("button03", "img/menu_03a.gif");
	Rollover("button04", "img/menu_04a.gif");
	Rollover("button05", "img/menu_05a.gif");
	Rollover("button06", "img/menu_06a.gif");
	Rollover("button07", "img/menu_07a.gif");