if (document.images) {

var offImgArray = new Array( )
offImgArray["home"] = new Image(120,38)
offImgArray["whatsnew"] = new Image(120,38)
offImgArray["contact"] = new Image(120,38)
offImgArray["register"] = new Image(120,38)
offImgArray["catalogue"] = new Image(120,38)
offImgArray["labels"] = new Image(120,38)

offImgArray["home"].src = "/images/home.gif"
offImgArray["whatsnew"].src = "/images/whatsnew.gif"
offImgArray["contact"].src = "/images/contactus.gif"
offImgArray["register"].src = "/images/register.gif"
offImgArray["catalogue"].src = "/images/catalogue.gif"
offImgArray["labels"].src = "/images/labels.gif"

var onImgArray = new Array( )
onImgArray["home"] = new Image(120,38)
onImgArray["whatsnew"] = new Image(120,38)
onImgArray["contact"] = new Image(120,38)
onImgArray["register"] = new Image(120,38)
onImgArray["catalogue"] = new Image(120,38)
onImgArray["labels"] = new Image(120,38)

onImgArray["home"].src = "/images/home_on.gif"
onImgArray["whatsnew"].src = "/images/whatsnew_on.gif"
onImgArray["contact"].src = "/images/contactus_on.gif"
onImgArray["register"].src = "/images/register_on.gif"
onImgArray["catalogue"].src = "/images/catalogue_on.gif"
onImgArray["labels"].src = "/images/labels_on.gif"

}

function imageOn(imgName) {
	if (document.images) {
		document.images[imgName].src = onImgArray[imgName].src
	}
}

function imageOff(imgName) {
	if (document.images) {
		document.images[imgName].src = offImgArray[imgName].src
	}
}