computingOff = new Image
computingOn = new Image
educationOff = new Image
educationOn = new Image
entertainOff = new Image
entertainOn = new Image
businessOff = new Image
businessOn = new Image
financeOff = new Image
financeOn = new Image
healthOff = new Image
healthOn = new Image
homelifeOff = new Image
homelifeOn = new Image
referenceOff = new Image
referenceOn = new Image
travelOff = new Image
travelOn = new Image
shoppingOff = new Image
shoppingOn = new Image

computingOff.src = "/graphs/btn_comput_off.gif"
computingOn.src = "/graphs/btn_comput_on.gif"
educationOff.src = "/graphs/btn_education_off.gif"
educationOn.src = "/graphs/btn_education_on.gif"
entertainOff.src = "/graphs/btn_entertain_off.gif"
entertainOn.src = "/graphs/btn_entertain_on.gif"
businessOff.src = "/graphs/btn_sm_biz_off.gif"
businessOn.src = "/graphs/btn_sm_biz_on.gif"
financeOff.src = "/graphs/btn_finance_off.gif"
financeOn.src = "/graphs/btn_finance_on.gif"
healthOff.src = "/graphs/btn_health_off.gif"
healthOn.src = "/graphs/btn_health_on.gif"
homelifeOff.src = "/graphs/btn_home_off.gif"
homelifeOn.src = "/graphs/btn_home_on.gif"
referenceOff.src = "/graphs/btn_ref_off.gif"
referenceOn.src = "/graphs/btn_ref_on.gif"
travelOff.src = "/graphs/btn_travel_off.gif"
travelOn.src = "/graphs/btn_travel_on.gif"
shoppingOff.src = "/graphs/btn_shop_off.gif"
shoppingOn.src = "/graphs/btn_shop_on.gif"

function rollover(a,b) {

document[a].src = eval(b + ".src")

}