# Leap Year Validation-urgent

Jun 8, 2007

I have dropdown for month and work days(in a month),textbox for year(yyyy).

I need to validate, if user select febraury and select other than 28 ( for non leap year), and select other than 29 ( for leap year) user should get error message.

same validations should be done for other months also.I need in Javascript or C#(VS2005)

## IndexOf - Leap Year In Date Picker

Jan 7, 2012

If you see my last post, it was a piece of this code that I was learning for/loops but now I have that all working(hence the new topic) and I'm having a problem with indexOf. Here's the whole script(its a fun little date picker)

function popSel(v){
var days;
var x;
if(v==01 || v==03 || v==05 || v==07 || v==08 || v==10 || v==12){
x = 31;
}else if(v==04 || v==06 || v==09 || v==12){
x = 30;
}else if(v==02){
/*var yr=document.getElementById("year").value / 4;*/
var yr = 2003 / 4;
if(yr.indexOf(".") == -1){ /*If you divide a year by 4 and the value is a whole number, it's a leap year*/
x=28;
}else{
x=29;
}}for(i = 1; i <= x; i++){
days += "<option value=" + i + ">" + i + "</option>";
}document.getElementById("day").innerHTML=days;
}
The whole script works but feb doesn't change?

## Form Field To Check For A Leap Year?

May 3, 2010

A non leap year can be divided by 100. But a leap year is divisible by both 4 and 400.This seems so simple yet I can't nail it. I'm taking an accelerated Javascript class and I was able to do all the problems up to this one. It's confusing me, or it may be that I've been up since 2 working on homework and getting ready for another test.

Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>

[code]....

## Date Validation Function (Month / Day And Year)

Apr 17, 2003

I am working on a series of functions that I keep getting asked about. The following three scripts do this:
--Date Validation
--Calculate Difference Between Dates

I am sure that these have been done before, but I just filled the last 20 minutes by coding these. I only did a quick browser test, nothing extensive.
<script>
//Date Validation
function DateValid(mo, dy, yr){
TheDate = mo+"/"+dy+"/"+yr;
Date1 = new Date(TheDate)
D=Date1.getDate();
M=Date1.getMonth()+1;
Y=Date1.getYear();
[Code] .....

## Replacing Eval() URGENT!

Mar 13, 2006

Im not all to sure what I can do right now. I have a script that I wrote for a userlookup on some website, problem is they have filtered out some key elements, to keep hackers away. Now, heres my problem. How can i make this return the same value, without using eval()

function doc() {
var f = Array (1);
f[0] = 'var d = doc'
f[1] = 'ument;'
eval(f.join(''));
return d;
}

Ive tried many thing, and had no sucess.

## JavaScript Date Difference, Accounting For Leap Years

Jun 19, 2006

I'm really sorry to post this as I know it must have been asked
countless times before, but I can't find an answer anywhere.

Does anyone have a snippet of JavaScript code I could borrow which
calculated the difference in years and days between two dates, and
takes leap years into account?

I'm calculating the difference in the usual way, i.e....

var difference = dateTo.getTime() - dateFrom.getTime();

....and converting this millisecond value into days by using...

var daysDifference = (difference/1000/60/60/24);

But how do I then display the difference in days AND years? I've tried
the following:

var yearsDifference = Math.floor(daysDifference/365.25);
var daysLeft = Math.floor(daysDifference-(yearsDifference*365.25));

....but it gives me inaccuracies. For example, if I use my code to
calculate the difference between 05/01/1998 and 05/01/2000 it returns 1
year and 364 days!

## Making February Have A 29th Day To Choose From On Leap Years Only?

Apr 7, 2009

How do you think I should go about making February have a 29th day to choose from on leap years only? Years that are multiples of 4 that is...

Code:
init();
function init(){

[code]....

## I Need To Get Same Day Last Year In Javascript!

Jul 20, 2005

I need to compute three dates in javascript - all of which relate to a given date, say todays date.

I need to calculate:

## Background For Each Day Of The Year?

Jun 1, 2007

so i want a background that changes each day. and ideally i wouldn't be using an array for this.. and instead could just do something like...

var d = new Date()
document.write("<body background='"d.getMonth(),d.getDate()".jpg'>")

with the images in the same directory being named 01.jpg for jan 1st, 031.jpg for jan 31st, etc. etc.

but i know nothing about the syntax or structure that that would require. i think my non-working example should at least explain what i want to accomplish... can someone tell me how i can do this? i know it's possible... i've seen every part i need in other scripts, and ten different ways to do it, but i just don't know how to make them all work together without getting a bunch of errors... :(

p.s. this is actually on my windows desktop, not a website. it seems like some scripts won't work in an html set as the desktop background, but will on a webpage.

## Displaying Year

Jun 27, 2007

I searched the forum on how to display a year. What I want to do is include the code so that the copyright year will automatically change without me manually changing it every year. I found the following code when doing a search in codingforums. Can I use this code on my site?

<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
var year=new Date().getYear();
if ( window.ActiveXObject ) {
document.write("" + year + "");
} else {
document.write("" + parseInt(year + 1900) + "");
}
// End -->
</SCRIPT>

Also, some sites have the original year the website was created for the copyright. Others have the current year, and yet others have the created year thru the current year. Is there any 'rule' on what is supposed to be displayed?

## Add Year To The Date?

May 31, 2011

I have two textfield and dropdown, i want add date to the first textfield and when change dropdown menu add year or month dynamically to the second text-field and I used this code but it give

NaN/NaN/NaN
function calDate() {
var dateArr = document.getElementById('date_field1').value;

[code]....

## Two Digit Year?

Feb 12, 2003

I am using the following Javascript to print the year, but I would like it to just have "03" instead of "2003". Can somebody tell me how to do this? I've tried searching several different sites and I can't figure out how to do this.

document.write(now.getFullYear());

## How I Set Next Year From Today?

May 2, 2010

I use this code to add today for 1 more year, but I have an error occur:

## Increase Year By 3

Jun 25, 2010

I have a script that I have been using to increase the year by 1 with a button click. Now I have a need to increase it by 3 when a certain condition exists. When docNum is like PE03.50.11/0022 and the number before the "/" is 11, I need to increase by 3. What I have is not working. It looks so simple. Can som fresh eyes give my some input?[code]

## Running J/s Only At Certain Times Of The Year?

Nov 21, 2007

Is there a small addition we can make to a .js file, so that it will only be
read during certain times of the year and ignored at the others? It's for a
Christmas promo.

We want it to run only from 1 Nov - 10 Jan, any year.

## JQuery :: How To Get Each Year To Act Independently Of Each Other

Sep 20, 2010

So I'm working on gallery page. The content is separated by years. I want the years of work to be able to collapse and expand when the year is clicked. I'm not sure how to get each year to act independently of each other and also to have the current year to not be hidden. Also, the way I have it now, it expands out of the screen before correcting itself.

## Keep All Cookies Set On My Page For A Year?

Jun 10, 2010

I really need some help with this. I am using the jQuery cookie file to set and retrieve my cookies, but I don't know how to modify it to set all cookies for more than one day.code...

## Does Javascript Have A Get Day Function For The Whole Year?

Oct 21, 2006

does javascript have a get day function for the whole year?

## JQuery :: Prepopulate With One Year Ahead

Nov 19, 2010

I have two fields

[Code]...

What I need when I select a date in in_date field I have to get 1 year from now in out_date. For example if in in_date I select "11/19/2010" I have to get out_date as 11/20/2011 I tried like

[Code]...

## Select The Month And Year In Calender?

Feb 2, 2010

i need one script just we select the month and year in calender.what we select the month and year that month and year respective data should be shown in the table.

## How To Display Different Array Element Each Day Of Year

Mar 4, 2011

I want to create an array for a religious website that will display a different Bible verse for each day of the year. This is how I incremented each day of the year.
var myDate=new Date();
myDate.setFullYear(2011,2,4);
myDate.setDate(myDate.getDate()+1);
How do I make the connection between the array and the new date as it changes?

This is a snippet from the array.
var dailyVerseRef=new Array();
dailyVerseRef[0]="Genesis 1:1";
dailyVerseRef[2]="Genesis 1:2";
dailyVerseRef[3]="Genesis 1:3";
dailyVerseRef[4]="Genesis 1:4";
dailyVerseRef[5]="Genesis 1:5";
dailyVerseRef[6]="Genesis 1:6";
dailyVerseRef[7]="Genesis 1:7";
dailyVerseRef[8]="Genesis 1:8";
I used a switch to go through the days of the week, but to go through the days of the year seems more difficult.

## Get Current & Next Year Months And Put Them Into Array ?

Nov 8, 2011

How it is possible to get current & next year months and put them into array....i.e

## Year/Month Drop Down Lists

Mar 20, 2006

I am trying to create simple JS code for two drop down lists...and I am unable to made anything work. Here are the specs:

On my asp page, I need two drop down lists, the first for a four position year (2006, 2005 , 2004, etc) and the second is for two position month. The hook is that I would like them to dynamically update in relation to the present date. Example...present month and year is 03/06. If I select &#392006;' from the year drop down - my only options for the month dropdown should be &#3903;', &#3902;', & &#3901;'. Next month (04/06), my options for the month dropdown should be &#3904;', &#3903;', &#3902;', & &#3901;'. If I select &#392005;' - my options for the month drop down should include all 12 months.

I would like this to update dynamically...with no hard coded dates. The range would be now to 5 years prior. It seems like it should be easy but I just can't get the darn thing.

## Using JS To Find A Year From Serial Numbers?

Aug 24, 2011

I have a list of serial numbers, a from and to set of numbers that correlate to a year. Id like to have a way to have a user enter a serial number, and have the year returned as the answer. For example;

100001 to 100100 = 1990
100101 to 100200 = 1991
100200 to 100300 = 1992

so if the user enters 100145 the answer 1991 would be returned

how to look for the correct code / function its hared to find the answer - catch 22.

## Sort The Month/Year Array?

Apr 10, 2009

I've an array of month/year to sort

Code:

var myArray = ['Oct/08', 'Jan/09', 'Mar/09', 'May/07', 'Apr/08', 'Dec/06'];

declare a hash of month with numbers as keys, split each array element and compare each month and sort it.

## JQuery :: Datepicker: Display Only The Current Year?

Jun 3, 2009

I use this:

\$("#datepicker").datepicker('option', 'numberOfMonths', [4, 3]);

However, the current date is displayed in the first month. I want Datepicker to display the whole year so that it would start from Jan