Live Demo: Palindrome program in JavaScript

<!DOCTYPE html>
<html>
  <body>
    <script>
      function Palindrome() {
       var r,rev=0,n,copy;
        n = parseInt(prompt("enter a number:"));
		copy=n;
        while (n != 0) {
          r = n % 10;
          rev = rev * 10 + r;
          n = parseInt(n / 10);
        }
		if(copy==rev)
		{
          document.write(copy+" is palindrom a number");
		}
		else
		{
		  document.write(copy+" is not palindrom a number");
		}
      }
    </script>
    <form>
      <input type="button" value="Palindrome" onclick="Palindrome();" />
    </form>
  </body>
</html>