You can edit / change the code and click run button
<!doctype html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> <title>first demo</title> <script src="../../../jquery-1.10.2.js"></script> </head> <body> <table> <tr><td>Number 1</td></tr> <tr><td>Number 2</td></tr> <tr><td>Number 3</td></tr> <tr><td>Number 4</td></tr> <tr><td>Number 5</td></tr> <tr><td>Number 6</td></tr> </table> <script> $( "tr:first" ).css( "color", "red" ); </script> </body> </html>