function navOn(x){ 
	obj01 = document.getElementById("navList"+x).style.visibility="visible";
	obj02 = document.images["nav-title" + x].src = "_i/nav/nav_title" + x + "_on.gif";
}

function navOff(x){ 
	obj01 = document.getElementById("navList"+x).style.visibility="hidden"; 
	obj02 = document.images["nav-title" + x].src = "_i/nav/nav_title" + x + ".gif";
}