You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>height demo</title> <style> body { background: gray; } button { font-size: 18px; margin: 8px; } p { width: 190px; border: 2px blue solid; } div { color: white; font-weight: bold; } </style> <script src="../../../jquery-1.10.2.js"></script> <script>var clicky_site_ids = clicky_site_ids || []; clicky_site_ids.push(101319977);</script><script async src="//static.getclicky.com/js"></script> <button id="getp">Paragraph Height</button> <button id="getd">Document Height</button> <button id="getw">Window Height</button> <div> </div> <p> example to test height() method </p> <script> function showHeight( element, height ) { $( "div" ).text(element + " height : " + height + "px." ); } $( "#getp" ).click(function() { showHeight( "paragraph", $( "p" ).height() ); }); $( "#getd" ).click(function() { showHeight( "document", $( document ).height() ); }); $( "#getw" ).click(function() { showHeight( "window", $( window ).height() ); }); </script>