<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 平均值爲：" + score);</script></p></body></html>