The U.S. dollar fell against other key currencies in European trading Friday. Gold prices fell, AP reported. The euro was quoted at US$1.2831, up from US$1.2795 late Thursday. Other dollar rates: _117.64 Japanese yen, down from 118.19 _1.2436 Swiss francs, down from 1.2479 _1.1435 Canadian dollars, up from 1.1421 The British pound was quoted at US$1.8952, up from US$1.8882. Gold traded in London at US$617.75 bid per troy ounce, down from US$624.40 late Thursday. In Zurich, the bid price was US$618.03, down from US$623.35. Gold fell US$4.80 in Hong Kong to close at US$618.20. Silver closed in London at US$12.68 bid per troy ounce, down from US$13.01.