function add_toggle ( elem ){
	var target = elem.id+'_cont';
	Effect.BlindUp( target, { duration: 1.0 } );
	var func = function () {
		Effect.toggle( target, 'blind', { duration: 0.2} );
	};
	Event.observe( elem, 'click', func );
}
function init () {
	var news = $('navi');
	var list = news.getElementsByTagName('h4');
	for( var i=0; i<list.length; i++ ) {
		 add_toggle( list[i] );
	}
}
Event.observe( window, 'load', init );