set a start date from the previous month 1

[ralphtrent]

I have a end date of 11/6/2009, I need set the start date to 10/31/2009.

Here is my code.

var endDate = new Date("11/06/2009");
var startDate = new Date();
startDate.setDate(today.getDate()-6)

This works great.

If I set my endDate to "10/30/2009", then I would need my start date to be "10/24/2009"

var endDate = new Date("10/30/2009");
var startDate = new Date();
startDate.setDate(today.getDate()-6)

but I am getting "11/24/2009", current month and current year? How do I subtract a date in JS and get the correct date back? I have tried google and search's here but would up down dead ends.

Any help is appreciated.

Thanks,
RalphTrent

 

[BillyRayPreachersSon]

I normally convert the original date into milliseconds using the "getTime()" method, subtract the number of millis in the number of days I want to use, and then convert back into a new Date object by passing the result into the Date constructor.

Hope this helps,
Dan



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[ralphtrent]

Thanks BillyRay, that worked out great. It stinks that is this complicated but as long as there is an easy solution, it works.

Thanks again.

 

[BillyRayPreachersSon]

Date manipulation doesn't have to be complex, though...

With

http://www.datejs.com/,

here's the sort of thing you can do:

// What date is next thrusday?
Date.today().next().thursday();
 
// Add 3 days to Today
Date.today().add(3).days();
 
// Is today Friday?
Date.today().is().friday();
 
// Number fun
(3).days().ago();

// 6 months from now
var n = 6;
n.months().fromNow();
 
// Set to 8:30 AM on the 15th day of the month
Date.today().set({ day: 15, hour: 8, minute: 30 });
 
// Convert text into Date
Date.parse(‘today’);
Date.parse(‘t + 5 d’); // today + 5 days
Date.parse(‘next thursday’);
Date.parse(‘February 20th 1973?);
Date.parse(‘Thu, 1 July 2004 22:30:00?);

Dan



Coedit Limited - Delivering standards compliant, accessible web solutions

Dan's Page [blue]@[/blue] Code Couch:

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