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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(){
  $("p").mouseover(function(){
    $("p").css("background-color", "yellow");
  });
  $("p").mouseout(function(){
    $("p").css("background-color", "lightgray");
  });
});
</script>
</head>
<body>
<p>Move the mouse pointer over this paragraph.</p>
</body>
</html>