function changeOverBG(calledFrom){
	if(calledFrom.parentNode.id != "navItemOn"){
		calledFrom.parentNode.style.backgroundImage = "url('_images/nav_on.gif')";
	}
}

function changeOutBG(calledFrom){
	if(calledFrom.parentNode.id != "navItemOn"){
		calledFrom.parentNode.style.backgroundImage = "";
	}
}