Date Comparison Validation

Sep 29, 2005

I have 2 textbox for Date input: Start Date and End Date I have javascript onsubmit="return fieldCheck()" to check all the required fields are not empty.

My problem is that i want to throw below javascript to check that End Date cannot be earlier than the Start Date. It works if both dates are in the same month, and if they are different month or day, then it's not working properly

d1_str = document.form.txtEndDate.value;
d2_str = document.form.txtStartDate.value;

d1 = new Date(d1_str.split('/')[2],d1_str.split('/')[1],d1_str.split('/')[0]);
d2 = new Date(d2_str.split('/')[2],d2_str.split('/')[1],d2_str.split('/')[0]);

if (d1.getTime()<d2.getTime()) {
emptyfields += "
End Date can't be earlier than Start Date" ; //this is the error msg
}

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Date Comparison Based On Selected Date

Jan 13, 2011

I have a drop down menu where people can select a month, day and year. Based on their selection, I want to show them an image.

If their selection is >= July 26, 2010 but <= July 25, 2011, show the red image;
If their selection is >= July 26, 2011 but <= July 25, 2012, show the white image;
If their selection is >= July 26, 2012 but <= July 25, 2013, show the blue image;
If their selection is >= July 26, 2013 but <= July 25, 2014, show the yellow image;

I don't know how to compare a selected date to a range of dates like this.

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Date Comparison

Mar 13, 2006

I would like to know how to compare dates in javascript.

var sdate = new Date(theform.SubmissionDate.value);
var odate = new Date(theform.StartDate.value);
var todaysdate = new Date();

if(sdate < todaysdate)
{
alert("Submissionn Date should not be less than current date");
return false;
}

if(sdate < odate)
{
alert("Submissionn Date should not be less than opening date");
return false;
}

My above comparison does'nt work. can u suggest some way?

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Date Fields Format DD/MM/YYY Comparison

Nov 30, 2010

Need pointing in the direction a script that can do the following:

Field A contains a date which is the the format dd/mm/yyyy format. Field B contains a date which is the the format dd/mm/yyyy format.

I want to check if B is greater that A , alse do an alert to user.

Code:
var d1 = Date.parse(f.Dep.value);
var d2 = Date.parse(f.Ret.value);

[Code]....

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Oct 30, 2005

I'm having trouble figuring out exactly how to write the confirmation/validation for the card expiration choices compared to the current date. I have the month and year choices in selection menus, as opposed to text boxes. Code:

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Jul 20, 2009

how to compare 2 user input dates (say Date1 and Date2) in dd/mm/yyyy format, to ensure that Date2 is at least 2 months after Date1. Comparing them in days is simple but I'm not sure where to start on months, taking into account differing number of days per month and leap years. e.g 01/01/2009 - 28/02/2009 would equal 2 months.

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Jul 23, 2005

It has appeared that ancient sources give a method for Numeric Date
Validation that involves numerous tests to determine month length;
versions are often posted by incomers here. That sort of code seems
unnecessarily long.

For some while, the following approach has been given here :-

function ValidDate(y, m, d) { // m = 0..11 ; y m d integers, y!=0
with (new Date(y, m, d))
return (getMonth()==m && getDate()==d) }

and it may remain the shortest code. But it does require, in every
case, the creation and disposal of a Date Object.

The following is about 50% longer in code, but about four times faster
in my system - and it seems to be right, too.

function DateOK(Y, M, D) {
return D>0 && (D<=[,31,28,31,30,31,30,31,31,30,31,30,31][M] ||
D==29 && M==2 && Y%4==0 && (Y%100>0 || Y%400==0) ) }

Note that checking for 1 <= M <= 12 is inherent, and that the Leapness
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Also, it is easy to use only the quadrennial rule if it is certain that
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JScript Date Validation

Dec 27, 2007

I have a form input that takes a date in the format MM/DD/YYYY.

I would like to validate this input using Javascript in two fashions:

1. I need to check that the format of the input is 'MM/DD/YYYY' with the month day and year being numeric

2. I need to also check that the 'MM/DD/YYYY' being input is later than today + 2 days (i.e. if today is 12/27/07, then the input must be 12/29/07 or greater)

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Feb 8, 2003

Recently while messing with dates, I noticed an odd quirk in javascript with new Date(), i.e. if someone enters an invalid date, such as 2/29/2003, javascript creates the new date as 3/1/2003.

Having a look around, I couldn't find any scripts that took advantage of this for the sake of date validation... probably someone here has done this before, but I'll post it anyway.

The idea is that if javascript creates a new Date() with a different month, then obviously the date entered is not valid. Most of the scripts I saw used some math to divide by leap year, yadda yadda yadda, but with this feature (?) of javascript, it seems unnecessary.

Right now this code only validates mm/dd/yyyy, but it should be easy to modify to support other formats:


function isDate(sDate) {
var re = /^d{1,2}/d{1,2}/d{4}$/
if (re.test(sDate)) {
var dArr = sDate.split("/");
var d = new Date(sDate);
return d.getMonth() + 1 == dArr[0] && d.getDate() == dArr[1] && d.getFullYear() == dArr[2];
}
else {
return false;
}
}


Here's a shorter version that works if you pass in the values separately:


function isDate(mm,dd,yyyy) {
var d = new Date(mm + "/" + dd + "/" + yyyy);
return d.getMonth() + 1 == mm && d.getDate() == dd && d.getFullYear() == yyyy;
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Dec 6, 2005

I have a $credit refund page that runs 2 date scripts. The first to input and format today's date for the date the form is sent:

function prefileDate(){
todaysDate = new Date;

month = todaysDate.getMonth();
if(month < 10){
month = "0" + (month +1);
} else { month++;}

day = todaysDate.getDate();
if(day < 10){
day = "0" + day;}

year = todaysDate.getYear();

document.getElementById("Date").value = month + "/" + day + "/" + year; }

The second script needs to run on 5 other date fields as an onblur call - BUT - I need this to also validate that the date entered is an older date that the "today's date" referred to in the above script. EX: the form is being sent on 12/5/05. the expdate below needs to be 12/6/05 or later. Code:

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{

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9974
<script type="text/javascript">
function compareDate()
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