<html><head><title>study 011</title><script language="JavaScript" type="text/javascript">...function Average(a, b, c, d)...{ return (a + b + c + d) / 4;}</script></head><body><p><script language="JavaScript" type="text/javascript">...score = Average(3, 4, 5, 6);document.write("3, 4, 5, 6 平均值为:" + score);</script></p></body></html>