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<!DOCTYPE html> <html> <head> <script src="/lib/jquery-1.12.2.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(event){ $("span").text(event.timeStamp); }); }); </script> </head> <body> <p>The click event occurred <span style="color:red">unknown</span> milliseconds after January 1, 1970.</p> <button>Click me</button> </body> </html>