RATIONALE: Drugs used in chemotherapy, such as oxaliplatin and docetaxel, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Radiation therapy uses high-energy x-rays to kill tumor cells. Oxaliplatin and docetaxel may make tumor cells more sensitive to radiation therapy. Giving oxaliplatin and docetaxel together with radiation therapy may kill more tumor cells.