Javascript--date Date Object

Date objects can store any date and can be accurate to milliseconds (1/1000 seconds).

Define a Time object:

Note : Use the first letter of the keyword New,date () to capitalize.

Makes udate a Date object and has an initial value: The current time (current computer system time).

If you want to customize the initial values, you can use the following methods:

var d = new Date (1);  October 1, 2012 var d = new Date (' OCT 1, 2012 '); October 1, 2012

We'd better use the "method" described below to strictly define the time.

access method Syntax:"< date objects >.< methods >"

Common methods for processing time and dates in a Date object:

Return/Set Year method

get/setFullYear() Returns/sets the year, expressed as a four-digit number.

var mydate=new Date ();//Current Time March 6, 2014 document.write (mydate+ "<br>");//output Current time document.write ( Mydate.getfullyear () + "<br>");//output Current year mydate.setfullyear (81); Set the year document.write (mydate+ "<br>"); The output year is set to 0081 years.

Note: different browsers, Mydate.setfullyear (81) have different results, and the year is set to 0081 or 812 cases.

Results:

Thu 10:57:47 gmt+08002014thu Mar 0081 10:57:47 gmt+0800

Attention:

1. The result format is: week, month, day, year, time, minute, second, time zone. (Firefox browser)

2. Different browser, time format has difference.

Return Week method

GetDay () returns a number of 0-6 in the week, 0 for Sunday. If you want to return the corresponding "week", complete with the array, the code is as follows:

<script type= "Text/javascript" >  var mydate=new date ();//define Date object  var weekday=["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];//defines the array object, assigns Var mynum=mydate.getday () to each array item,  //The return value is stored in the variable mynum  document.write ( Mydate.getday ());//output GetDay () Gets the value  document.write ("Today is:" + weekday[mynum]);//Output Week </script>

Note: The above code was run on March 7, 2014, Friday.

Results:

5

Today is: Friday

return/Set Time method

get/settime () Returns/sets the time, in milliseconds, to calculate the number of milliseconds from January 1, 1970 0 o'clock to the date the Date object refers to.

If the current date object's time is postponed by 1 hours, the code is as follows:

<script type= "Text/javascript" >  var mydate=new Date ();  document.write ("Current Time:" +mydate+ "<br>");  Mydate.settime (Mydate.gettime () + * + *);  document.write ("Delay One hour:" + mydate);</script>

Results:

Current time: Thu Mar 6 11:46:27 utc+0800 2014

One hour delay: Thu Mar 6 12:46:27 utc+0800 2014

Note: 1. An hour 60 minutes, a minute 60 seconds, a second 1000 milliseconds

2. The time delay is 1 hours, that is: "X.settime (X.gettime () + 60 * 60 * 1000);"

Javascript--date Date Object