<html> <head> <title>jQuery nth-child example</title> <script type="text/javascript" src="jquery.js"></script> </head> <body> <h1>jQuery nth-child example</h1> <table border=1> <tr><td>Row #1</td></tr> <tr><td>Row #2</td></tr> <tr><td>Row #3</td></tr> <tr><td>Row #4</td></tr> <tr><td>Row #5</td></tr> <tr><td>Row #6</td></tr> <tr><td>Row #7</td></tr> <tr><td>Row #8</td></tr> <tr><td>Row #9</td></tr> <tr><td>Row #10</td></tr> </table> <br/> <button>:nth-child(4)</button> <button>:nth-child(3n)</button> <button>:nth-child(even)</button> <button>:nth-child(odd)</button> <script type="text/javascript"> $("button").click(function () { var str = $(this).text(); $("tr").css("background", "white"); $("tr" + str).css("background", "coral"); }); </script> </body> </html>