Sydney, July 23 (BridgeNews) - The U.S. dollar firmed slightly against the major currencies, while weakening slightly against Australian dollar, New Zealand dollar and Asian regional currencies, particularly the Indonesian rupiah. The dollar against the yen bounced from 122.95 to 123.62 on buying from European names before retreating to 123.40 on selling from Japanese exporters and U.S. names. A fall in the Japanese stock market helped weaken the yen