Mega Code Archive
Global NaN
<![CDATA[
The NaN object represents an object that is not equal to any number, including itself.
NaN stands for Not a Number.
<html>
<body>
<script lanuguage="JavaScript">
<!--
if ("a" != NaN){
document.write("This is not a number");
}else{
document.write("This is a number");
}
-->
</script>
</body>
</html>
]]>