Dateadd and datediff for JS

Paste the Javascript I wrote first Code For more information, see.

/* Get the date after the date, month, day, and other plus numbers */

Date. Prototype. dateadd = function (interval, number)

{


VaR d = this;


VaR K = {'y': 'fullyear ',
'Q': 'month ',
'M': 'month ',
'W': 'date ',
'D': 'date ',
'H': 'urs ',
'N': 'minutes ',
'S ': 'seconds ',
'Ms': 'milliseconds '};


VaR n = {'q': 3,
'W': 7 };


Eval ('d. set '+ k [interval] +' (D. get '+ k [interval] +' () + '+ (n [interval] | 1) * Number) + ')');

Return D;

}

/* Calculate the date, year, month, and day of the two dates */

Date. Prototype. datediff = function (interval, objdate2)

{


VaR d = this, I = {},
T = D. gettime (), T2 = objdate2.gettime ();


I ['y'] = objdate2.getfullyear ()-D. getfullyear ();


I ['q'] = I ['y'] * 4 + math. Floor (objdate2.getmonth ()/4)-math. Floor (D. getmonth ()/4 );


I ['M'] = I ['y'] * 12 + objdate2.getmonth ()-D. getmonth ();


I ['ms'] = objdate2.gettime ()-D. gettime ();


I ['W'] = math. Floor (T2 + 345600000)/(604800000)-math. Floor (t + 345600000)/(604800000 ));


I ['D'] = math. Floor (T2/86400000)-math. Floor (T/86400000 );


I ['H'] = math. Floor (T2/3600000)-math. Floor (T/3600000 );


I ['n'] = math. Floor (T2/60000)-math. Floor (T/60000 );


I ['s '] = math. Floor (T2/1000)-math. Floor (T/1000 );

Return I [interval];

}
Dateadd Method

Returns the date object with the specified interval added.

Dateobj. dateadd (Interval, number)

Parameters

Dateobj

Required. ArbitraryDateObject.

Interval

Required. String expression, indicating the time interval to be added. For values, see the "Settings" section.

Number

Required. Numeric expression, indicating the number of time intervals to be added. A numeric expression can be a positive number (to get the future date) or a negative number (to get the past date ).

Datediff Method

Returns the time interval between two date objects.

Dateobj. datediff (Interval, dateobj2)

Parameters

Interval

Required. String expression used for calculationDate1AndDate2Time interval. For values, see the "Settings" section.

Dateobj, dateobj2

Required. Date object. Two date objects used for calculation.

Set

IntervalParameters can have the following values:

& Lt; th width = "75%" & gt; description & lt;/th & gt;

Settings
Y	year
q	quarter
m	month
d	day
W	week
H	hour
n	minute
S	seconds
MS	millisecond