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<!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script> <script> $(document).ready(function(){ $(".intro").css("background-color","yellow"); }); </script> </head> <body> <h1>Welcome to My Homepage</h1> <p class="intro">My name is Donald.</p> <p>I live in Duckburg.</p> <div class="intro">My name is Dolly.</div> <p>I live in Duckburg.</p> </body> </html>
