var submenu01On = new Image();
var submenu01Off = new Image();
var submenu02On = new Image();
var submenu02Off = new Image();
var submenu03On = new Image();
var submenu03Off = new Image();

submenu01On.src = root + "images/menu/parents/top/submenu-01-readingOn.gif";
submenu01Off.src = root + "images/menu/parents/top/submenu-01-readingOff.gif";
submenu02On.src = root + "images/menu/parents/top/submenu-02-mathOn.gif";
submenu02Off.src = root + "images/menu/parents/top/submenu-02-mathOff.gif";
submenu03On.src = root + "images/menu/parents/top/submenu-03-basicsOn.gif";
submenu03Off.src = root + "images/menu/parents/top/submenu-03-basicsOff.gif";