<html> <head> <script type="text/javascript" src="js/jquery-1.3.2.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("p").click(function () { $(this).toggleClass("blue"); }); }); </script> </head> <style> .blue { color:blue; } </style> <body> <body> <p class=blue>A</p> </body> </html>