You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>lt demo</title> <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> <table border="1"> <tr><td>Zero</td><td>One</td><td>Two</td></tr> <tr><td>Three</td><td>Four</td><td>Five</td></tr> <tr><td>Six</td><td>Seven</td><td>Eight</td></tr> </table> <script> $( "td:lt(5)" ).css( "backgroundColor", "green" ); </script>