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<!DOCTYPE html> <html> <body> Time: <input type="time" id="myTime" value="16:32:55"> <p>Click the button to decrement the value of the time field by 10 minutes (each time you click).</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("myTime").stepDown(10); } </script> </body> </html>