HTML
<HTML>
<HEAD>
<TITLE>JAVASCRIPT</TITLE>
</HEAD>
<BODY>
<SCRIPT>
var a= parseInt(prompt("Enter a string"));
if(isNaN(a)==true)
{
if(isFinite(a)==true)
{
document.write("It is not a number and a finite value");
}
else
{
document.write("It is not a number and an infinte value");
}
}
else
{
document.write("It is a number");
}
</SCRIPT>
</BODY>
</HTML>
