■スクリプト
<HTML>
<HEAD>
<TITLE>Sample</TITLE>
</HEAD>
<BODY bgColor="white">
<CENTER>
<H1>文字列を数値に変換します</H1>
</CENTER>
<TABLE BORDER="1">
<SCRIPT Language="JavaScript">
<!--
myStr = "1696.215";
Str1 = "123";
Str2 = "OpenSpace";
alert("parseFloat('1696.215')", parseFloat(myStr));
alert("parseFloat('123')", parseFloat(Str1));
alert("parseFloat('OpenSpace')",parseFloat(Str2));
// -->
</SCRIPT>
</TABLE>
</BODY></HTML>