function show_hidden(i,sum){
	document.getElementById(i).style.display = '';
	for(j=1;j<=sum;j++){
			if(j!=i){
					document.getElementById(j).style.display = 'none';
			}
	}
}

/*
function showDate(ln){
	var strdate;
	var dt = new Date();
	if (ln=='vn'){			
		var strarrDay = new Array("Ch? nh?t", "Th? hai", "Th? ba", "Th? tu", "Th? nam", "Th? sáu", "Th? b?y"); 
		var strarrMonth = new Array("01","02","03","04","05","06","07","08","09","10","11","12"); 
	}else if(ln=='en'){
		var strarrDay = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thurday", "Friday", "Saturday"); 
		var strarrMonth = new Array("Jan","Feb","Mar","Apr","May","Jun","July","Aug","Sept","Oct","Nov","Dec");
	}else{
		var strarrDay = new Array("Dimanche", "Lundi", "Mardi", "Mercredi", "Jeudi", "Vendredi", "Samedi"); 
		var strarrMonth = new Array("Janvier","Février","Mars","Avril","Mai","Juin","Juillet","Août","Septembre","Octobre","Novembre","Decembre");
	}
	var strThu = dt.getDay();
	strThu = strarrDay[strThu] + ", ";
	var strDay=dt.getDate();
	if (strDay<10) strDay="0" + strDay
	var strMonth= dt.getMonth();
	strMonth= strarrMonth[strMonth] ;
	var strYears = dt.getYear();
	if (strYears<1900) strYears += 1900;
	
	if (ln=='vn'){
		strdate = "&nbsp;" + strThu + " ngày " + strDay + "/" + strMonth + "/" + strYears;
	}else if(ln=='en'){
		strdate = "&nbsp;" + strThu +  strMonth + " " + strDay + " " + strYears;
	}else{
		strdate = "&nbsp;" + strThu + " " + strDay + " " + strMonth + " " + strYears;
	}

	trang = "&nbsp;&nbsp;";
	document.getElementById("NgayHT").innerHTML = trang + strdate;
}
*/