The current generation knows him as the serenity-seeking Frank Costanza from "Seinfeld." An older generation knows him as one-half of the comedy team Stiller and Meara. But, as his memoir, "Married to Laughter," reveals, Jerry Stiller has had a lifelong love affair with entertainment. Growing up during the Depression in Brooklyn and on Manhattan's Lower East Side, Jerry Stiller discovered the power of comedy when, as a child, he saw Eddie Cantor transform an audience. Jerry's father often took him to vaudeville performances, where Jerry decided that he, too, wanted to make people laugh. He studied drama at Syracuse University, where a charismatic professor inspired Jerry to believe that he could achieve his dream and become a successful actor. After Syracuse, Jerry returned to New York to begin a life in the theater. Jerry soon met Anne Meara. Even before he fell in love with her, he knew she was a remarkable person. At first they encouraged each other in their separate performances, but eventually they began doing a comedy act in the coffeehouses of New York's Greenwich Village. They created a brilliantly successful act with