อยากทราบว่าสคริปตัวนี้ใช้ภาษาอะไรเขียนค่ะ หนูอยากจะเรียนรู้ค่ะ

import mx.controls.Alert;
import mx.formatters.CurrencyFormatter;

public function form_complete():void
{
     prepareCalculationBindings();
}
private var UnitPrices:ArrayCollection;
private var Quantitys:ArrayCollection;
private var Amounts:ArrayCollection;
private var Total:TextInput;
private var DiscountPercent:TextInput;
private var Discount:TextInput;
private var AfterDiscount:TextInput;
private var Vat:TextInput;
private var GrandTotal:TextInput;

private function prepareCalculationBindings():void
{
     UnitPrices = getElementsByName("UnitPrice");
     Quantitys = getElementsByName("Quantity");
     Amounts = getElementsByName("Amount");
     Total = getElementsByName("Total")[0];
     DiscountPercent = getElementsByName("DiscountPercent")[0];
     Discount = getElementsByName("Discount")[0];
     AfterDiscount = getElementsByName("AfterDiscount")[0];
     Vat = getElementsByName("Vat")[0];
     GrandTotal = getElementsByName("GrandTotal")[0];

     var cf:CurrencyFormatter = new CurrencyFormatter();
     cf.precision = 2;
     cf.currencySymbol = "";
     cf.useThousandsSeparator = true;

     for(var i:int=0; i<UnitPrices.length; i++)
          viewer.createMultiplyBinding(UnitPrices[i],"text",Quantitys[i],"text",Amounts[i],"text",1,cf)

     viewer.createSummationBinding(Amounts.toArray(),"text",Total,"text",1,cf);

     viewer.createMultiplyBinding(DiscountPercent,"text",Total,"text",Discount,"text",1/100,cf);

     viewer.createSubtractBinding(Total,"text",Discount,"text",AfterDiscount,"text",cf);

     viewer.createBasicNumberBinding(AfterDiscount,"text",Vat,"text",7/100,cf);

     viewer.createAdditionBinding(AfterDiscount,"text",Vat,"text",GrandTotal,"text",cf);
}