(java Script) (if you can show the code and a quick a explanation thanks)

Create a an Object constructor function called BankAcct with the properties acctNum, acctOwner, checkBalance, saveBalance, acctType. 

Define a BankAcct.prototype method called checkTransfer() that accepts a amount as an argument. The method should check if the amount + checkBalance is greater than 0 before setting a new checkBalance amount.