Understanding variable scoping with async statements

Question

When I do the following:

for (var CurrentRow=0;CurrentRow < qryMfg.RecordCount;CurrentRow++){
    console.log(qryMfg.MFGID[CurrentRow]);
    dbo.transaction(function(myTrans) {
        console.log(qryMfg.MFGID[CurrentRow]);
    });
}

I get a list of MfgID the way that I want, followed by a list of unknowns because dbo.transaction is executing asynchronously.

How do I pass a variable into dbo.transaction?