■スクリプト
<HTML>
<HEAD>
<TITLE>Sample</TITLE>
</HEAD>
<BODY bgColor="white">
<CENTER>
<H1>絶対値を求めます</H1>
</CENTER>
<TABLE BORDER="1">
<SCRIPT Language="JavaScript">
<!--
alert("Math.abs(123.456) = ",Math.abs(123.456));
alert("Math.abs(-1969.215) = ",Math.abs(-1969.215));
alert("Math.abs(0) = ",Math.abs(0));
// -->
</SCRIPT>
</TABLE>
</BODY></HTML>