JavaScript Programming

Date
Returns today's date including date, month, and year. Note that the getMonth method returns 0 in January, 1 in February etc. So add 1 to the getMonth method to display the correct date.

Time
Returns the current local time including hour, minutes, and seconds. To return the GMT time use getUTCHours, getUTCMinutes etc.

Set date
You can also set the date or time into the date object, with the setDate, setHour etc. Note that in this example, only the FullYear is set.

UTC time
The getUTCDate method returns the Universal Coordinated Time which is the time set by the World Time Standard.

Display weekday
A simple script that allows you to write the name of the current day instead of the number. Note that the array object is used to store the names, and that Sunday=0, Monday=1 etc.

Display full date
How to write a complete date with the name of the day and the name of the month.

Display time
How to display the time on your pages. Note that this script is similar to the Time example above, only this script writes the time in an input field. And it continues writing the time one time per second.

Date Object

The Date object is used to work with dates and times. 

To create an instance of the Date object and assign it to a variable called "d", you do the following:

var d=new Date()

After creating an instance of the Date object, you can access all the methods of the Date object from the "d" variable.

To return the current day in a month (from 1-31) of a Date object, write the following:

d.getDate()

The Date object can also have the following parameters:

new Date(milliseconds)
new Date(dateString)
new Date(yr_num, mo_num, day_num [, hr_num, min_num, sec_num, ms_num])

• milliseconds - the number of milliseconds since 01 January, 1970 00:00:00
• dateString - the date in a format that is recognized by the Date.parse method
• yr_num, mo_num, day_num - the year, month or day of the date
• hr_num, min_num, sec_num, ms_num - the hours, minutes, seconds and milliseconds

If you only use Date(), JavaScript creates an object for today's date according to the time on the local machine.

Here are some examples on how to create Date objects:

var d=new Date("October 12, 1988 13:14:00")
var d=new Date("October 12, 1988")
var d=new Date(88,09,12,13,14,00)
var d=new Date(88,09,12)
var d=new Date(500)

The Date object's properties and methods are described below:

NN: Netscape, IE: Internet Explorer

Properties

Syntax: object.property_name

Methods

Syntax: object.method_name()