function fold(pvId,pvFold){
	var lvDt = document.getElementById(pvId + '_dt');
	var lvDd = document.getElementById(pvId + '_dd');
	if(pvFold){
		lvDt.className = "closed";
		lvDd.className = "closed";
	}else{
		lvDt.className = "open";
		lvDd.className = "open";
	}
}