if (document.images) {

var nav_homeA = new Image()
nav_homeA.src = "images/nav_home_off.gif"
var nav_homeZ = new Image()
nav_homeZ.src = "images/nav_home_on.gif"

var nav_aboutA = new Image()
nav_aboutA.src = "images/nav_about_off.gif"
var nav_aboutZ = new Image()
nav_aboutZ.src = "images/nav_about_on.gif"

var nav_membersA = new Image()
nav_membersA.src = "images/nav_members_off.gif"
var nav_membersZ = new Image()
nav_membersZ.src = "images/nav_members_on.gif"

var nav_joinA = new Image()
nav_joinA.src = "images/nav_join_off.gif"
var nav_joinZ = new Image()
nav_joinZ.src = "images/nav_join_on.gif"

var nav_eventsA = new Image()
nav_eventsA.src = "images/nav_events_off.gif"
var nav_eventsZ = new Image()
nav_eventsZ.src = "images/nav_events_on.gif"
 
var nav_sponsorshipA = new Image()
nav_sponsorshipA.src = "images/nav_sponsorship_off.gif"
var nav_sponsorshipZ = new Image()
nav_sponsorshipZ.src = "images/nav_sponsorship_on.gif"

var nav_scholarshipsA = new Image()
nav_scholarshipsA.src = "images/nav_scholarships_off.gif"
var nav_scholarshipsZ = new Image()
nav_scholarshipsZ.src = "images/nav_scholarships_on.gif"

var nav_newsA = new Image()
nav_newsA.src = "images/nav_news_off.gif"
var nav_newsZ = new Image()
nav_newsZ.src = "images/nav_news_on.gif"

var nav_resourcesA = new Image()
nav_resourcesA.src = "images/nav_resources_off.gif"
var nav_resourcesZ = new Image()
nav_resourcesZ.src = "images/nav_resources_on.gif"

var nav_jobbankA = new Image()
nav_jobbankA.src = "images/nav_jobbank_off.gif"
var nav_jobbankZ = new Image()
nav_jobbankZ.src = "images/nav_jobbank_on.gif"

}
function act(imgName) {
if (document.images)
document[imgName].src = eval(imgName + 'Z.src')
}

function inact(imgName) {
if (document.images)
document[imgName].src = eval(imgName + 'A.src')
}