<html>
<head><title></title></head>
<body>
<script language="JavaScript">
<!--
document.write("<pre>");
document.write("转化为逻辑型数据");
var a=NaN,b=null;
if(a){
document.write("NaN转换为Boolean后值为true<br>");
}
else{
document.write("NaN转换为Boolean后值为false<br>");
}
document.write("</pre>");
-->
</script>
</body>
</html>
参考资料:sername