var sopen =false;
	var aopen =false;

	function ms( _s, _all ) {
		if (aopen) {
			$(aopen).innerHTML ='';
			$(aopen).style.display ='none';
			aopen =false;
		}

		x =_all.split(',');

		if (sopen == _s) _s =false;
		for (i =0; i <x.length; i ++) {
			if (x[i] != 'EMPTY') $(x[i]).style.display =(x[i] == _s) ? 'block' : 'none';
		}
		sopen =_s;
	}

	function ab( _a ) {
		if (aopen) {
			$(aopen).innerHTML ='';
			$(aopen).style.display ='none';
			if (aopen == _a) {
				aopen =false;
				return;
			}
		}

		aopen =_a;
		$(aopen).style.display ='block';

		new Ajax.Updater( 
			_a, 
			'/abstract.php', 
			{ method: 'post', parameters: 'ab=' +_a }
			);

		aopen =_a;
	}