■スクリプト
<HTML>
<HEAD>
<TITLE>Sample</TITLE>
</HEAD>
<BODY bgColor="white">
<CENTER>
<H1>オブジェクトの値を返します</H1>
</CENTER>
<TABLE BORDER="1">
<SCRIPT Language="JavaScript">
<!--
alert("window.valueOf = ",window.valueOf());
alert("document.valueOf = ",document.valueOf());
alert("Date.valueOf = ",Date.valueOf());
alert("Math.valueOf = ",Math.valueOf());
// -->
</SCRIPT>
</TABLE>
</BODY></HTML>