<html> <head> <script type="text/javascript" src="js/jquery-1.3.2.js"></script> <script type="text/javascript"> $(document).ready(function(){ $("p").text("<b>Some</b> new text."); }); </script> <style> .selected { color:red; } .highlight { background:yellow; } </style> </head> <body> <body> <p class="selected highlight">Hello first</p> <p class="">Hello</p> </body> </html>