function imageMapMouseOver(element){
	if (element=="barRack"){document.wwtp.src = "pics/overview00.jpg"}
	if (element=="gritChamber"){document.wwtp.src = "pics/overview01.jpg"}
	if (element=="primaryClarifier"){document.wwtp.src = "pics/overview02.jpg"}
	if (element=="activatedSludgeProcess"){document.wwtp.src = "pics/overview03.jpg"}
	if (element=="disinFection"){document.wwtp.src = "pics/overview04.jpg"}
	if (element=="mouseOut"){document.wwtp.src = "pics/bwwt04.jpg"}
}