Solved

Using DateJS to add months, function not working

Posted on 2011-09-03
6
610 Views
Last Modified: 2012-05-12
My screen: https://www.interactivehealthpartner.com/mfc_goals.asp
DateJS documention: http://code.google.com/p/datejs/wiki/APIDocumentation

Code attached. This line not working:
var weight2aa=date.weight2a.addMonths($('#term').val());

From the documentation:

addMonths
.addMonths ( Number months ) : Date
Adds the specified number of months to this instance given the number of months to add. The number can be positive or negative.
Parameters
{Number months} The number of months to add. The number can be positive or negative. required
Return Value
{Date} this
Example
Date.today().addMonths(6);
Date.today().addMonths(-6);

Firebug says: "date is not defined". I must be doing something wrong, would appreciate any advise. Thank you!
$('#weight1d').click(function(){
	if ($('#weight1a').val().length>0 && $('#weight1b').val().length>0){
		if (isNumber($('#weight1a').val()) && isNumber($('#weight1b').val())){
			$('#weight1a').removeClass('redbg');
			$('#weight1b').removeClass('redbg');
			var weight2a=$('#startdate option:selected').val();
			var weight2aa=date.weight2a.addMonths($('#term').val());
			alert(weight2aa);
		} else {
			if (not(isNumber($('#weight1a').val()))){$('#weight1a').addClass('redbg');}
			if (not(isNumber($('#weight1b').val()))){$('#weight1b').addClass('redbg');}
		}
	} else {
		if ($('#weight1a').val().length==0){$('#weight1a').addClass('redbg');}
		if ($('#weight1b').val().length==0){$('#weight1b').addClass('redbg');}
	}
});

Open in new window

0
Comment
Question by:bbdesign
  • 2
  • 2
  • 2
6 Comments
 
LVL 43

Expert Comment

by:Rob
ID: 36479481
What version of Firefox are you using?  your "date" variable is lowercase, try Date
0
 
LVL 75

Accepted Solution

by:
Michel Plungjan earned 500 total points
ID: 36480022
This looks so wrong in so many ways

var weight2a=$('#startdate option:selected').val();// a string, not a date

var weight2aa=date.weight2a.addMonths($('#term').val()); // does not make any sense.

Perhaps you mean
http://code.google.com/p/datejs/wiki/APIDocumentation#parseExact

// assuming term contains a number and weight2a contains mm/dd/yyyy
var weight2aa=Date.parseExact(weight2a,"M/d/yyyy").addMonths($('#term').val()).toString("M/d/yyyy");
0
 
LVL 43

Expert Comment

by:Rob
ID: 36480276
mplungian is right about
var weight2aa=date.weight2a.addMonths($('#term').val());

weight2a is not a Date object and val() returns a string

so is should read (using parseInt - FYI you will get NaN if it's not a number):

var weight2aa = Date.addMonths(parseInt($('#term').val()));

though I disagree with the addMonths as it accepts a number not a string or date:

.addMonths ( Number months ) : Date
0
Webinar: Aligning, Automating, Winning

Join Dan Russo, Senior Manager of Operations Intelligence, for an in-depth discussion on how Dealertrack, leading provider of integrated digital solutions for the automotive industry, transformed their DevOps processes to increase collaboration and move with greater velocity.

 

Author Comment

by:bbdesign
ID: 36480415
Thanks. This helps, but I still get an error. I made sure my variables are Date and Integer now, using the attached code. When I run it in Firebug, it says: Date.weight2aDate is undefined (line 3). Any advice given that? Thank you.
var weight2aDate=Date.parseExact($('#startdate option:selected').val(), 'M/d/yyyy');
var weight2aTerm=parseInt($('#term').val());
var weight2aEnd=Date.weight2aDate.addMonths(weight2aTerm);
alert(weight2aDate);
alert(weight2aTerm);
alert(weight2aEnd);

Open in new window

0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 36480447
Try weight2aDate.addMonths instead of Date....
I'll look later
0
 

Author Comment

by:bbdesign
ID: 36480459
I believe that did it! Thanks!
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this article you'll learn how to use Ajax calls within your CodeIgniter application. To explain this, I'll illustrate how to implement a simple contact form to allow visitors to send you an email through your web site.
Boost your ability to deliver ambitious and competitive web apps by choosing the right JavaScript framework to best suit your project’s needs.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question