FOREX-Dollar holds steady ahead of Friday jobs data

* Euro hits session highs versus dollar after Trichet

* Major currencies in ranges before jobs report Friday

* BoE ups QE by 25 bln sterling, low end of forecasts (Recasts, adds quotes, updates prices, details)

By Wanfeng Zhou

NEW YORK, Nov 5 (Reuters) - The dollar held steady against a basket of currencies on Thursday a day ahead of a key government jobs report that will shed light on the health of the U.S. economy.

The euro earlier got a boost after European Central Bank President Jean-Claude Trichet presented an optimistic tone on euro zone growth, saying the economy will recover next year. For more, see [ID:nECBNEWS]

Both the ECB and the Bank of England left interest rates unchanged on Thursday. The decisions came after the U.S. Federal Reserve on Wednesday held borrowing costs near zero percent and kept its commitment to low rates for an "extended period."

With the central bank meetings out of the way, investors turned their attention to Friday's U.S. jobs data. The economy likely lost 175,000 jobs in October, while the jobless rate rose to 9.9 percent, according to economists polled by Reuters.

"We should be relatively subdued today given the fact that we have this very important number out tomorrow," said John McCarthy, director of foreign exchange at ING Capital Markets in New York.