You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>focus demo</title> <style> .focused { background: red; } </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> <div id="content"> <input tabindex="1"> <input tabindex="2"> <select tabindex="3"> <option>select menu</option> </select> <div tabindex="4"> This is a div </div> <p>When you click inside the form it changes it background color to red </p></div> <script> $( "#content" ).delegate( "*", "focus blur", function() { var elem = $( this ); setTimeout(function() { elem.toggleClass( "focused", elem.is( ":focus" ) ); }, 0 ); }); </script>