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Date Validation in JavaScript

, 21 Apr 2006
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An article to validate dates in JavaScript.

Introduction

This code is developed to validate date entered in a web page. I found several other code snippets that provide a solution, but they are all vague and confusing, while this JavaScript script provides an easy method of validating a date. Check out this.

Using the code

Shown below is the core code for the date validation, written in JavaScript:

//
 function IsValidDate(Day,Mn,Yr){
    var DateVal = Mn + "/" + Day + "/" + Yr;
    var dt = new Date(DateVal);

    if(dt.getDate()!=Day){
        alert('Invalid Date');
        return(false);
        }
    else if(dt.getMonth()!=Mn-1){
    //this is for the purpose JavaScript starts the month from 0
        alert('Invalid Date');
        return(false);
        }
    else if(dt.getFullYear()!=Yr){
        alert('Invalid Date');
        return(false);
        }
        
    return(true);
 }
//

If you plan to add this to a custom validator in ASP.NET, then the following method will do:

The code below is written for calling the above JavaScript function:

function CallDateFun(sender, args){
   var d=document.getElementById("DayDropDownListCtl").value
   var m=document.getElementById("MonthDropDownListCtl").value
   var y=document.getElementById("YearDropDownListCtl").value

   if(IsValidDate(d,m,y))
        args.IsValid=true;
   else
        args.IsValid=false;
}

This is the code for the custom validator:

<asp:CustomValidator ID="CustomDateValidatorCtl" 
  runat="server"  ClientValidationFunction="CallDateFun" 
  Text="Invalid Date" ControlToValidate="DayDropDownListCtl">
</asp:CustomValidator>

Note: DayDropDownListCtl, MonthDropDownListCtl, and YearDropDownListCtl are the dropdown lists for the date, month, and year, respectively.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

jebarson
Software Developer (Senior) Microsoft Corporation
India India
I work for Microsoft on MS technologies for application development. My interests include .net, WCF, Azure, Windows Phone, ASP.net, SL, WCF, WPF and many more.
 
You can visit my site at http://www.jebarson.info
 
Follow me on twitter @jebarson007
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Comments and Discussions

 
QuestionNice Article PinmemberSiva Hyderabad3-Apr-14 20:44 
GeneralMy vote of 4 PinmemberMd. Humayun Rashed1-Jul-12 0:53 
GeneralMy vote of 1 PinmemberJohn Kasra12-Feb-12 12:09 
GeneralMy vote of 1 Pinmemberziaalam27-Jan-12 2:21 
GeneralWorks greatly... PinmemberWaleed Eissa29-Sep-08 17:30 
QuestionHow about marking 'Automatically adjust clock...' Pinmembermurillobraga18-Jun-08 10:11 
General30th feb validation Pinmemberintern8-Jun-08 18:36 
AnswerRe: 30th feb validation Pinmemberjebarson17-Jun-08 5:40 
GeneralA approach more easy to use Pinmembertiger.zeng4-Feb-07 20:22 
GeneralRe: A approach more easy to use Pinmemberjebarson10-Apr-07 21:55 
Generalcustom validator errormessage Pinmembertwinvaibhav5-Jan-07 0:21 
GeneralRe: custom validator errormessage Pinmemberjebarson5-Jan-07 11:10 
GeneralAnother solution PinmemberPeter Blum26-Apr-06 6:19 
GeneralRe: Another solution Pinmembervinodjnair12-Jun-06 0:28 

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