■スクリプト
<HTML> <HEAD> <TITLE>Sample</TITLE> </HEAD> <BODY bgColor="white"> <CENTER> <H1>演算可能かどうか調べます</H1> </CENTER> <TABLE BORDER="1"> <SCRIPT Language="JavaScript"> <!-- document.write("「<B>123</B>」は"+isFinite(123)+"<BR>"); document.write("「<B>-123.5</B>」は"+isFinite(-123.5)+"<BR>"); document.write("「<B>1+2+3-5</B>」は"+isFinite(1+2+3-5)+"<BR>"); document.write("「<B>MZ3500</B>」は"+isFinite("MZ3500")+"<BR>"); // --> </SCRIPT> </TABLE> </BODY></HTML>