■スクリプト
<HTML> <HEAD> <TITLE>arity</TITLE> </HEAD> <BODY bgColor="white"> <CENTER> <H1>引数の数を取得</H1> </CENTER> <SCRIPT Language="JavaScript"> <!-- function check(a,b) { document.write("引数の数:",check.arity,"<BR>"); } check("古籏","一浩"); // --> </SCRIPT> </BODY> </HTML>