homeon = new Image(95,42)
homeon.src = "images/home_on.gif"
homeoff = new Image(95,42)
homeoff.src = "images/home_off.gif"

mapon = new Image(123,42)
mapon.src = "images/map_on.gif"
mapoff = new Image(123,42)
mapoff.src = "images/map_off.gif"

contacton = new Image(113,42)
contacton.src = "images/contact_on.gif"
contactoff = new Image(113,42)
contactoff.src = "images/contact_off.gif"

markeron = new Image(93,42)
markeron.src = "images/marker_on.gif"
markeroff = new Image(93,42)
markeroff.src = "images/marker_off.gif"

spaceron = new Image(85,42)
spaceron.src = "images/spacer_on.gif"
spaceroff = new Image(85,42)
spaceroff.src = "images/spacer_off.gif"

easyon = new Image(60,42)
easyon.src = "images/easy_on.gif"
easyoff = new Image(60,42)
easyoff.src = "images/easy_off.gif"

function changeImg(cImg,ref) {
document.images[cImg].src = ref.src
}