Js date-related function summary _ javascript tips-js tutorial

Recently I wrote a countdown program, because it often needs to be accessed on the mobile phone end, so jquery is not referenced. I am not used to jquery. The following describes the js date-related functions and the principle of countdown. The Code is as follows:

Var dateTo = new Date ("8:00 1/4/2014 ");

Gets the time object of the specified date. If it is null, the default value is the current time.

The Code is as follows:

Var date = dateTo. getTime ()

Returns the number of milliseconds. the start and end time is the time of January 1, 1970.

The Code is as follows:

Var y = date. getFullYear ();

Get year

The Code is as follows:

Var mm = date. getMonth () + 1;

Get month

The Code is as follows:

Var d = date. getDate ();

Get date

The Code is as follows:

Var h = date. getHours ();

Hours

The Code is as follows:

Var m = date. getMinutes ();

Get minutes

The Code is as follows:

Var s = date. getSeconds ();

Get seconds

The idea of Countdown is to calculate the time difference between the two times, and then use

SetInterval (); execute the corresponding function once per second.

The following functions may be used in this process:

ParseInt ($ trNum );

This function converts a number of the string type into a number.