Not class
<html> <head> <script type="text/javascript" src="js/jquery-1.3.2.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("p").not(".green").css("border-color", "red"); }); </script> <style> p { width:60px; height:60px; margin:10px; float:left; background:yellow; border:2px solid white; } </style> </head> <body> <body> <p>asdf</p> <p id="blue">asdf</p> <p class="green">asdf</p> <p class="gray">asdf</p> </body> </html>