function open_on(statTypeId, periodId, description, lang)
{
			var UrlResponse = baseHref+'/stmap/dtree';
			data = '?statTypeId='+statTypeId+'&periodId='+periodId+'&lang='+lang;

			if (periodId==0) document.getElementById("legend").style.display='none';
				else document.getElementById("legend").style.display='block';
			document.getElementById("description").innerHTML=description;
			
			request.innerHTML = '&nbsp;<script></' + 'script>';
			var s = request.getElementsByTagName("script")[0];
			s.language = "JavaScript";
			if (s.setAttribute) s.setAttribute('src', UrlResponse+data); else s.src = UrlResponse+data;
}