You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>even demo</title> <style> table { background: #eee; } </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> <table border="1"> <tr><td>Row 0 Even</td></tr> <tr><td>Row 1 Odd</td></tr> <tr><td>Row 2 Even </td></tr> <tr><td>Row 3 Odd</td></tr> <tr><td>Row 4 Even</td></tr> </table> <script> $( "tr:even" ).css( "background-color", "red" ); </script>