Remove style class
<html> <head> <script type="text/javascript" src="js/jquery-1.3.2.js"></script> <style type="text/css"> a.test { font-weight: bold; color:red;} </style> <script type="text/javascript"> $(document).ready(function(){ $("a").addClass("test"); $("a").removeClass("test"); }); </script> </head> <body> <a href="http://java2s.com/">java2s.com</a> </body> </html>