// JavaScript Document
	function chuyendoi(){
		var so_luong = document.getElementById("soluong").value;
		var tu_loai_tien = document.getElementById("tu_loai").value;
		var den_loai_tien = document.getElementById("den_loai").value;
		var tu_loai_;
		var den_loai_;
		if(tu_loai_tien==1){
				tu_loai_='VND';
		}else{
			for(var i=0;i<12;i++){	
						if(vCosts[i]==tu_loai_tien){
							tu_loai_ = vForexs[i];
						}
					}
				}
				if(den_loai_tien==1){
					den_loai_='VND';
				}else{
					for(var j=0;j<12;j++){	
						if(vCosts[j]==den_loai_tien){
							den_loai_ = vForexs[j];
						}
						
					}	
				}
				if(tu_loai_tien!=1){
					tu_loai_tien*=1000;
				}
				if(den_loai_tien!=1){
					den_loai_tien*=1000;
				}
				var tiengviet = so_luong*tu_loai_tien;
				var kq = tiengviet/den_loai_tien;
				
				kq = format_number(kq,3);//lam tron so voi 3 so le
				var xuat_soluong = numberFormat(so_luong.toString());//dinh dang dau phay cho phan nghan
				var xuat_kq = numberFormat(kq.toString());//dinh dang dau phay cho phan nghan
				document.getElementById("ketqua").innerHTML="<p>"+xuat_soluong+tu_loai_+" = "+xuat_kq+den_loai_+"</p>";
	}