Solved

Date validation between two date and not greater then 2 from start date

Posted on 2008-10-07
4
1,222 Views
Last Modified: 2010-04-21
I have two date input boxes Start ans End date. The end date cannot be earlier then the start date also the end date cannot be greater then 24 months from start date .  I found this code in the forums that validates as well as formats, so i would like to try to keep it.
<HEAD>
 

<SCRIPT LANGUAGE="JavaScript">

<!-- Original:  Mike Welagen (welagenm@hotmail.com) -->
 

<!-- This script and many more are available free online at -->

<!-- The JavaScript Source!! http://javascript.internet.com -->
 

<!-- Begin

function checkdate(objName) {

var datefield = objName;

if (chkdate(objName) == false) {

datefield.select();

alert("That date is invalid.  Please try again.");

datefield.focus();

return false;

}

else {

return true;

   }

}

function chkdate(objName) {

var strDatestyle = "US"; //United States date style

//var strDatestyle = "EU";  //European date style

var strDate;

var strDateArray;

var strDay;

var strMonth;

var strYear;

var intday;

var intMonth;

var intYear;

var booFound = false;

var datefield = objName;

var strSeparatorArray = new Array("-"," ","/",".");

var intElementNr;

var err = 0;

var strMonthArray = new Array(12);

strMonthArray[0] = "Jan";

strMonthArray[1] = "Feb";

strMonthArray[2] = "Mar";

strMonthArray[3] = "Apr";

strMonthArray[4] = "May";

strMonthArray[5] = "Jun";

strMonthArray[6] = "Jul";

strMonthArray[7] = "Aug";

strMonthArray[8] = "Sep";

strMonthArray[9] = "Oct";

strMonthArray[10] = "Nov";

strMonthArray[11] = "Dec";

strDate = datefield.value;

if (strDate.length < 1) {

return true;

}

for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {

if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {

strDateArray = strDate.split(strSeparatorArray[intElementNr]);

if (strDateArray.length != 3) {

err = 1;

return false;

}

else {

strDay = strDateArray[0];

strMonth = strDateArray[1];

strYear = strDateArray[2];

}

booFound = true;

   }

}

if (booFound == false) {

if (strDate.length>5) {

strDay = strDate.substr(0, 2);

strMonth = strDate.substr(2, 2);

strYear = strDate.substr(4);

   }

}

if (strYear.length == 2) {

strYear = '20' + strYear;

}

// US style

if (strDatestyle == "US") {

strTemp = strDay;

strDay = strMonth;

strMonth = strTemp;

}

intday = parseInt(strDay, 10);

if (isNaN(intday)) {

err = 2;

return false;

}

intMonth = parseInt(strMonth, 10);

if (isNaN(intMonth)) {

for (i = 0;i<12;i++) {

if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {

intMonth = i+1;

strMonth = strMonthArray[i];

i = 12;

   }

}

if (isNaN(intMonth)) {

err = 3;

return false;

   }

}

intYear = parseInt(strYear, 10);

if (isNaN(intYear)) {

err = 4;

return false;

}

if (intMonth>12 || intMonth<1) {

err = 5;

return false;

}

if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {

err = 6;

return false;

}

if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {

err = 7;

return false;

}

if (intMonth == 2) {

if (intday < 1) {

err = 8;

return false;

}

if (LeapYear(intYear) == true) {

if (intday > 29) {

err = 9;

return false;

}

}

else {

if (intday > 28) {

err = 10;

return false;

}

}

}

if (strDatestyle == "US") {

datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;

}

else {

datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;

}

return true;

}

function LeapYear(intYear) {

if (intYear % 100 == 0) {

if (intYear % 400 == 0) { return true; }

}

else {

if ((intYear % 4) == 0) { return true; }

}

return false;

}

function doDateCheckStarting(start_date, end_date) {

if (Date.parse(start_date.value) <= Date.parse(end_date.value)) {

alert("Dates are good.");

}

else {

if (start_date.value == "" || end_date.value == "")

alert("Start date and End Date must be entered.");

else

alert("Start date must occur before the End Date .");

   }

}

//  End -->

</script>

</HEAD>
 

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->
 

<BODY>
 

<center>

<form>

<pre>

Start Date <input type=text name=start_date onBlur="checkdate(this)" size=11 maxlength=11 id="start_date">

End Date  <input type=text name=end_date   onBlur="checkdate(this)" size=11 maxlength=11 id="end_date">
 

<input type=button name=formatbutton onClick="doDateCheckStarting(this.form.start_date, this.form.end_date)" value="Check">

</pre>

</form>

</center>

Open in new window

0
Comment
Question by:Upperdecker
  • 2
  • 2
4 Comments
 
LVL 16

Accepted Solution

by:
Lolly-Ink earned 500 total points
Comment Utility
Modifications:
1. Line 30 - initialised strYear.
2. function doDateCheckStarting - check for > 2 year difference

<html>

<HEAD>

 

<SCRIPT LANGUAGE="JavaScript">

<!-- Original:  Mike Welagen (welagenm@hotmail.com) -->

 

<!-- This script and many more are available free online at -->

<!-- The JavaScript Source!! http://javascript.internet.com -->

 

<!-- Begin

function checkdate(objName) {

var datefield = objName;

if (chkdate(objName) == false) {

datefield.select();

alert("That date is invalid.  Please try again.");

datefield.focus();

return false;

}

else {

return true;

   }

}

function chkdate(objName) {

var strDatestyle = "US"; //United States date style

//var strDatestyle = "EU";  //European date style

var strDate;

var strDateArray;

var strDay;

var strMonth;

var strYear = "";

var intday;

var intMonth;

var intYear;

var booFound = false;

var datefield = objName;

var strSeparatorArray = new Array("-"," ","/",".");

var intElementNr;

var err = 0;

var strMonthArray = new Array(12);

strMonthArray[0] = "Jan";

strMonthArray[1] = "Feb";

strMonthArray[2] = "Mar";

strMonthArray[3] = "Apr";

strMonthArray[4] = "May";

strMonthArray[5] = "Jun";

strMonthArray[6] = "Jul";

strMonthArray[7] = "Aug";

strMonthArray[8] = "Sep";

strMonthArray[9] = "Oct";

strMonthArray[10] = "Nov";

strMonthArray[11] = "Dec";

strDate = datefield.value;

if (strDate.length < 1) {

return true;

}

for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {

if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {

strDateArray = strDate.split(strSeparatorArray[intElementNr]);

if (strDateArray.length != 3) {

err = 1;

return false;

}

else {

strDay = strDateArray[0];

strMonth = strDateArray[1];

strYear = strDateArray[2];

}

booFound = true;

   }

}

if (booFound == false) {

if (strDate.length>5) {

strDay = strDate.substr(0, 2);

strMonth = strDate.substr(2, 2);

strYear = strDate.substr(4);

   }

}

if (strYear.length == 2) {

strYear = '20' + strYear;

}

// US style

if (strDatestyle == "US") {

strTemp = strDay;

strDay = strMonth;

strMonth = strTemp;

}

intday = parseInt(strDay, 10);

if (isNaN(intday)) {

err = 2;

return false;

}

intMonth = parseInt(strMonth, 10);

if (isNaN(intMonth)) {

for (i = 0;i<12;i++) {

if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {

intMonth = i+1;

strMonth = strMonthArray[i];

i = 12;

   }

}

if (isNaN(intMonth)) {

err = 3;

return false;

   }

}

intYear = parseInt(strYear, 10);

if (isNaN(intYear)) {

err = 4;

return false;

}

if (intMonth>12 || intMonth<1) {

err = 5;

return false;

}

if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {

err = 6;

return false;

}

if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {

err = 7;

return false;

}

if (intMonth == 2) {

if (intday < 1) {

err = 8;

return false;

}

if (LeapYear(intYear) == true) {

if (intday > 29) {

err = 9;

return false;

}

}

else {

if (intday > 28) {

err = 10;

return false;

}

}

}

if (strDatestyle == "US") {

datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;

}

else {

datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;

}

return true;

}

function LeapYear(intYear) {

if (intYear % 100 == 0) {

if (intYear % 400 == 0) { return true; }

}

else {

if ((intYear % 4) == 0) { return true; }

}

return false;

}

function doDateCheckStarting(start_date, end_date) {

if (Date.parse(start_date.value) <= Date.parse(end_date.value)) {

   if ((Date.parse(end_date.value) - Date.parse(start_date.value)) > (2 * 365 * 24 * 60 * 60 * 1000))

   {

      alert("End Date is more than 24 months after Start Date.");

   }

   else

   {

      alert("Dates are good.");

   }

}

else {

if (start_date.value == "" || end_date.value == "")

alert("Start date and End Date must be entered.");

else

alert("Start date must occur before the End Date .");

   }

}

//  End -->

</script>

</HEAD>

 

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->

 

<BODY>

 

<center>

<form>

<pre>

Start Date <input type=text name=start_date onBlur="checkdate(this)" size=11 maxlength=11 id="start_date">

End Date  <input type=text name=end_date   onBlur="checkdate(this)" size=11 maxlength=11 id="end_date">

 

<input type=button name=formatbutton onClick="doDateCheckStarting(this.form.start_date, this.form.end_date)" value="Check">

</pre>

</form>

</center>

   

</body>

</html>

Open in new window

0
 

Author Comment

by:Upperdecker
Comment Utility
So are you saying on line 30 I should

var strYear > "2";
0
 
LVL 16

Expert Comment

by:Lolly-Ink
Comment Utility
I initialised the variable strYear as a string because it is possible that a user can enter an invalid date (such as "1") and you would have got a JavaScript error when attempting to access strYear.length when strYear is not a string yet.
0
 

Author Closing Comment

by:Upperdecker
Comment Utility
Thanks
0

Featured Post

Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

Join & Write a Comment

In this article, we'll look how to sort an Array in JavaScript, including the more advanced techniques of sorting a collection of records either ascending or descending on two or more fields. Basic Sorting of Arrays First, let's look at the …
JavaScript can be used in a browser to change parts of a webpage dynamically. It begins with the following pattern: If condition W is true, do thing X to target Y after event Z. Below are some tips and tricks to help you get started with JavaScript …
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…

771 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now