x na stepen n

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script type="text/javascript">
var x =prompt("x");
var n = prompt("n");
var i, y;
x=parseInt(x);
n=parseInt(n);
if((!isNaN(x))&&(!isNaN(n)))
{

  {
    for(i = 1,y=x;i < n ; i++)
    {
      x*=y;
    }
    document.write(y+ " ^ " + n + " = " + x);
  }
}
else{document.write("You haven't entered an integer !")}

</script>
</body>
</html>