You can edit / change the code and click run button <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>empty demo</title> <style> td { text-align: center; } </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> #0</td><td></td></tr> <tr><td> #2</td><td></td></tr> <tr><td></td><td>#5</td></tr> </table> <script> $( "td:empty" ) .text( " Empty!" ) .css( "background", "red" ); </script>