<!DOCTYPE html>
<html>
<body>
<p>The instanceof operator returns true if the specified object is an instance of the specified object.</p>
<p id="demo"></p>
<script>
var cars = ["Saab", "Volvo", "BMW"];
document.getElementById("demo").innerHTML =
(cars instanceof Array) + "<br>" +
(cars instanceof Object) + "<br>" +
(cars instanceof String) + "<br>" +
(cars instanceof Number);
</script>
</body>
</html>