protected void lnkCreditCardVoidAuth_Click(object sender, EventArgs e)
{
this.MessageBox1.ClearMessage();
string transactionId = this.lstCreditCardAuths.SelectedItem.Value;
decimal amount = ParseMoney(this.CreditCardAuthAmount.Text);
ShowTransaction(payManager.CreditCardVoid(transactionId, amount));
LoadCreditCardLists();
}