function display(id)
{
	var title_id = 'title_' + id;
	var th_id    =    'th_' + id;
	if(document.getElementById(id).style.display == 'none' || !document.getElementById(id).style.display) {
		document.getElementById(id).style.display = 'block';
		document.getElementById(title_id).className = 'open';
		document.getElementById(th_id).className = 'th_open';
	} else {
		document.getElementById(id).style.display = 'none';
		document.getElementById(title_id).className = '';
		document.getElementById(th_id).className = '';
	}
}