|Date of birth||25 November 1957|
|Place of birth||Gottwaldov, Czechoslovakia|
|Height||1.78 m (5 ft 10 in)|
|1987-1988||RC Jet de Bruxelles||20||(4)|
|* Senior club appearances and goals counted for the domestic league only|
He started in 1967 in TJ Gottwaldov, where he played till 1977. Then he went from 3rd league club to 1st league club Zbrojovka Brno when he was 19. In 1st season in Brno, he won the Czechoslovak First League in 1978.
He missed Euro 1980 in Italy (3rd place) and Moscow Olympic Games 1980 (1st place) due to peptic ulcer disease. He participated in the 1982 FIFA World Cup in Spain, but he did not score, although he played all 3 matches.
Only 5 years after the title, Zbrojovka Brno was relegated in 1983. Jane?ka, as a national team member, went to Bohemians Prague (which had won its only league title in 1983) to avoid playing in 2nd league.
In 1987, after Bohemians Prague played with Belgian club Beveren in 1987-88 UEFA Cup 1st round, Jane?ka went to another Belgian club, RC Jet de Bruxelles.