var offButt = new Array()
offButt[2] = new Image
offButt[3] = new Image
offButt[4] = new Image
offButt[5] = new Image
offButt[6] = new Image
offButt[7] = new Image



offButt[2].src = "nvhl_home_off.gif"
offButt[3].src = "nvhl_clients_off.gif"
offButt[4].src = "nvhl_about_off.gif"
offButt[5].src = "nvhl_offer_off.gif"
offButt[6].src = "nvhl_contact_off.gif"
offButt[7].src = "nvhl_products_off.gif"



var onButt = new Array()
onButt[2] = new Image
onButt[3] = new Image
onButt[4] = new Image
onButt[5] = new Image
onButt[6] = new Image
onButt[7] = new Image


onButt[2].src = "nvhl_home_on.gif"
onButt[3].src = "nvhl_clients_on.gif"
onButt[4].src = "nvhl_about_on.gif"
onButt[5].src = "nvhl_offer_on.gif"
onButt[6].src = "nvhl_contact_on.gif"
onButt[7].src = "nvhl_products_on.gif"



function imageOn(i) {
document.images[i].src = onButt[i].src
}
function imageOff(i) {
document.images[i].src = offButt[i].src
}