function lefter(url, current) {
	var naviXML;
	var naviAjax = new Ajax.Request(
		url, 
		{
			method: 'get',
			onComplete: showLefter
		}
	);
	function showLefter(httpObj) {
		var hiddenObjects = new Array();
		$('lefter').innerHTML = get_response_text(httpObj);
		setLefter(current);
	}
}
function setLefter(current) {
	if ( current ) {
		Element.setStyle(current, { fontWeight: "bold"});
	}
}
function get_response_text ( req ) {
	var text = req.responseText;
	if ( navigator.appVersion.indexOf( "KHTML" ) > -1 ) {
		var esc = escape( text );
		if ( esc.indexOf("%u") < 0 && esc.indexOf("%") > -1 ) {
			text = decodeURIComponent( esc );
		}
	}
	return text;
}