How to get the value in the database in JS_javascript skills

public class AjaxMethod www.jb51.net
{
public AjaxMethod()
{
//TODO: Add constructor logic here
//
}
[Ajax.AjaxMethod(Ajax.HttpSessionState Requirement .Read)]
public static string GetCardMoney(string cardNo,string cardPwd)
{
string mConn = IConfiguration.getParameter("connectString");
IDBOSQL.IDBO dbo = IDBOSQL.IDBO.getIDBO (mConn);
dbo.openDatabase();
DataSet ds = dbo.executeSelectSql("select Card_Money,Service_Discount,Good_Discount from Table_CardInfo join Dic_CardType on Table_CardInfo.CardType_ID= Dic_CardType.CardType_ID where Card_NO= '" cardNo "' and Card_Pwd= '" cardPwd "'and card_Status='normal'");
DataTable dt = ds.Tables[0];
string money = dt.Rows[0][0].ToString();
string service_discount = dt.Rows[0][1].ToString();
string good_discount = dt.Rows[0][2].ToString();
dbo.closeDatabase();
         return money "," service_discount ',' good_discount;//Return here a string composed of multiple values ​​​​
   }
}

moneydiscount= AjaxMethod.GetCardMoney(card, pwd).value ;
moneydiscount// is a string composed of multiple values. If you want to get multiple values, you can convert the string into an array and then access it.
arr=moneydiscount.split(","); //In this case, it is very convenient to use Ajax to return multiple values.

document.getElementById("txtCard_Money1").value=arr[0];