var profileOn = new Image()
profileOn.src = imageDir + "hnav_pf_o.gif"

var historyOn = new Image()
historyOn.src = imageDir + "hnav_hs_o.gif"

var contactOn = new Image()
contactOn.src = imageDir + "hnav_cu_o.gif"

var profileOff = new Image()
profileOff.src = imageDir + "hnav_pf.gif"

var historyOff = new Image()
historyOff.src = imageDir + "hnav_hs.gif"

var contactOff = new Image()
contactOff.src = imageDir + "hnav_cu.gif"