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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(){
  personObj = new Object();
  personObj.firstname = "John";
  personObj.lastname = "Doe";
  personObj.age = 50;
  personObj.eyecolor = "blue"; 
  $("button").click(function(){
    $("div").text($.param(personObj));
  });
});
</script>
</head>
<body>
<button>Serialize object</button>
<div></div>
</body>
</html>