From http://www.w3schools.com (Copyright Refsnes Data)

JavaScript setHours() Method

Date Object Reference JavaScript Date Object

Definition and Usage

The setHours() method is used to set the hour of a specified time.

Syntax

dateObject.setHours(hour,min,sec,millisec)

Parameter Description
hour Required. A numeric value between 0 and 23 representing the hour
min Optional. A numeric value between 0 and 59 representing the minutes
sec Optional. A numeric value between 0 and 59 representing the seconds
millisec Optional. A numeric value between 0 and 999 representing the milliseconds

Tips and Notes

Note: If one of the parameters above is specified with a one-digit number, JavaScript adds one or two leading zeros in the result.

Note: This method is always used in conjunction with a Date object.

Examples

Example 1

Set the hour of the current time to 15:

<script type="text/javascript">

var d=new Date();
d.setHours(15);
document.write(d);

</script>

The output of the code above will be:


Try it yourself »

Example 2

Set the time to 15:35:01:

<script type="text/javascript">

var d=new Date();
d.setHours(15,35,1);
document.write(d);

</script>

The output of the code above will be:


Try it yourself »

Date Object Reference JavaScript Date Object

From http://www.w3schools.com (Copyright Refsnes Data)