Note: Sets the hour. Syntax: dateName.setHours(param1, param2, param3, param4) Parameters: param1 Required; the hour. Value: 0 to 23. param2 Optional; the minute. Value: 0 to 59. param3 Optional; the seconds. Value: 0 to 59. param4 Optional; the milliseconds that have elapsed during the current second. Value: 0 to 999.