function on( name ){
	document.images[ name ].src = "../images/" + name + "-on.gif";


	if( name.substring(0,3) == 'nav' ){
		document.images[ "description" ].src = "../images/description-" + name + ".gif";
	}
}


function off( name ){
	document.images[ name ].src = "../images/" + name + ".gif";


	if( name.substring(0,3) == 'nav' ){
		document.images[ "description" ].src = "../images/description-nav-left-privacy.gif";
	}
}