function acnvalidation(logac){
//var logac = test.accountNumber.value;
var db = logac.substring(0,2).toUpperCase();
var airport = logac.substring(0,3).toUpperCase();
var acn = logac.substring(3,logac.length);
var acnmsgi = "Please be advised that your NEW ACCOUNT NUMBER IS";
var acnmsg = acn + "\n Pleaes login again with your new account number. \nYour password remains unchanged.";
  if (db=="DB"){
         switch(airport){
			case "DBA":
			alert( acnmsgi +" EWR" + acnmsg);
			break;
			case "DBB":
			alert(acnmsgi + " BWI" + acnmsg);
			break;
			case "DBC":
			alert(acnmsgi + " ORD" + acnmsg);
			break;
			case "DBD":
			alert(acnmsgi + " CHI" + acnmsg);
			break;
			case "DBF":
			alert(acnmsgi + " MIA" + acnmsg);
			break;
			case "DBG":
			alert(acnmsgi + " ATL" + acnmsg);
			break;
			case "DBH":
			alert(acnmsgi + " BOS" + acnmsg);
			break;
			case "DBI":
			alert(acnmsgi + " OMA" + acnmsg);
			break;
			case "DBJ":
			alert(acnmsgi + " JFK" + acnmsg);
			break;
			case "DBK":
			alert(acnmsgi + " MCI" + acnmsg);
			break;
			case "DBL":
			alert(acnmsgi + " LAX" + acnmsg);
			break;
			case "DBM":
			alert(acnmsgi + " MSP" + acnmsg);
			break;
			case "DBN":
			alert(acnmsgi + " SAN" + acnmsg);
			break;
			case "DBO":
			alert(acnmsgi + " SFO" + acnmsg);
			break;
			case "DBR":
			alert(acnmsgi + " RDU" + acnmsg);
			break;
			case "DBS":
			alert(acnmsgi + " SEA" + acnmsg);
			break;
			case "DBT":
			alert(acnmsgi + " TPA" + acnmsg);
			break;
			case "DBU":
			alert(acnmsgi + " SLC" + acnmsg);
			break;
			case "DBV":
			alert(acnmsgi + " DEN" + acnmsg);
			break;
			case "DBW":
			alert(acnmsgi + " DFW" + acnmsg);
			break;
			case "DBX":
			alert(acnmsgi + " LRD" + acnmsg);
			break;
			case "DBY":
			alert(acnmsgi + " DYN" + acnmsg);
			break;
			case "DBZ":
			alert(acnmsgi + " TUS" + acnmsg);
			break;
			default: 
			alert("Please be advised that your ACCOUNT NUMBER HAS CHANGED. \n Please contact DBA.");
		}
            return false;
	}// if
   
	return true;
}