how to add 3 days to a date and get the result date ?

[bugbugb]

Hi,
I am trying to add days to a date variable but there does not seem to be any method available in the date object to do this (like dateadd function in vbscript). Can anyone please help me out ?

Bugbugb

[mpjbrennan]

Javascript date values are calculated in milliseconds. Try the following:

var oneMinute = 60*1000
var oneHour = oneMinute*60
var oneDay = oneHour*24
var threeDays = oneDay*3

var targetDate = new Date()
dateInMs = targetDate.getTime()
dateInMs += threeDays
targetDate.setTime(dateInMs)

this could be made more concise but I thought it would be clearer in this format

(based on Danny Goodman's "Javascript Bible")

patrick

[aCcodeMonkey]

mpjbrennan,

You have to just need to use the Date() and obj.getDate() functions.

The example below write the current date and the date three days from now.


<script language="javascript">
var nDays = 3;
var oDate = new Date();
var nCurrDay = oDate.getDate();
// Add 'X' days to the current date
var newDay = (nCurrDay+nDays);
//Display the formatted dates
document.write('Current Date: '+oDate.getMonth()+'/'+nCurrDay+'/'+oDate.getYear()+'<br>');
document.write('New Date: '+oDate.getMonth()+'/'+newDay+'/'+oDate.getYear());
</script>


Hope this helps.. :cool:

[mpjbrennan]

That gives a Current Date of 8/27/2002 and a New Date of 8/30/2002 when I try it. In Mozilla/NS the year is 102

document.write(targetDate.getDate() + "/" + (targetDate.getMonth()+1) + "/" + targetDate.getFullYear()) will print out 30/9/2002 in both IE and Mozilla/NS

patrick

[jkd]

I'll move this thread to the more appropriate Javascript Programming forum, considering this has nothing to do with DOM Scripting.

[boywonder]

Hi, I am trying to add days to a date variable but there does not seem to be any method available in the date object to do thisto add 3 days to a date, all you need is:
var dt = new Date();
dt.setDate(dt.getDate()+3);
hope that helps

[bugbugb]

Hello everyone ,

Thanks a lot for your contributions and I did find them very useful as each one has taught me a diferent approach. I did try one out myself and here is what I have come up with. Please let me know if there are any problems with this one

function AddToDate(DateVal,Yrs,Mnths,Days)
{
// DateVal - a start date (date)
// Yrs - years to add (int)
// Mnths - months to add (int)
// Days - days to add (int)
// this function returns the new date resultant of a date addition

var Dt = (DateVal == ""?(new Date()):(new Date(DateVal)))

Yrs = (Yrs == ""?0:parseInt(Yrs))
Mnths = (Mnths == ""?0:parseInt(Mnths))
Days = (Days == ""?0:parseInt(Days))

return new Date(Dt.getFullYear()+Yrs,Dt.getMonth()+Mnths,Dt.getDate()+Days)

}


regards and thanks to all,
bugbugb

[COBOLdinosaur]

newdate= new Date(olddate.valueof() + (nofofDays*24*3600*1000));

Then format using the date methods of newdate