Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("#span1").text($(window).height());
    $("#span2").text($(document).height());
  });
});
</script>
</head>
<body>

<p>The height of this window is <span id="span1">unknown</span> px.</p>
<p>The height of this document is <span id="span2">unknown</span> px.</p>

<button>Return the height of the window and document elements</button>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.