var imageOn = new Array()
var imageOff = new Array()

imageOn[1] = new Image(142,21)
imageOn[1].src = "http://www.tatepublishing.com/images/menumain1on.gif"
imageOn[2] = new Image(142,20)
imageOn[2].src = "http://www.tatepublishing.com/images/menumain2on.gif"
imageOn[3] = new Image(142,20)
imageOn[3].src = "http://www.tatepublishing.com/images/menumain3on.gif"
imageOn[4] = new Image(142,20)
imageOn[4].src = "http://www.tatepublishing.com/images/menumain4on.gif"

imageOff[1] = new Image(142,21)
imageOff[1].src = "http://www.tatepublishing.com/images/menumain1off.gif"
imageOff[2] = new Image(142,20)
imageOff[2].src = "http://www.tatepublishing.com/images/menumain2off.gif"
imageOff[3] = new Image(142,20)
imageOff[3].src = "http://www.tatepublishing.com/images/menumain3off.gif"
imageOff[4] = new Image(142,20)
imageOff[4].src = "http://www.tatepublishing.com/images/menumain4off.gif"

function switchImageOn(i) {
	var imageValue = "image" + i
	document[imageValue].src = imageOn[i].src
}

function switchImageOff(i) {
	var imageValue = "image" + i
	document[imageValue].src = imageOff[i].src
}