Change the maximum time allowed:
document.getElementById("myTime").max = "23:00";
Click the button to change the value of the max attribute of the time field.
<!DOCTYPE html> <html> <body> Time: <input type="time" id="myTime" min="20:00" max="22:00"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from w ww.jav a 2 s. c om*/ var x = document.getElementById("myTime").max = "23:00"; document.getElementById("demo").innerHTML = "The value of the max attribute was changed."; } </script> </body> </html>