
	ASP Shopping Cart, Forum & BBS - all for $20 from CodeToad Plus!

Home || ASP | ASP.Net | C++/C# | DHTML | HTML | Java | Javascript | Perl | VB | XML || CodeToad Plus! || Forums || RAM

Search Site:

Home » HTML » Article

Validate Date

Article by:

Kannadasan Ramiah (4/24/2003)

	Add to Favourites
	Tell a friend

Summary:

Validating Date entered in a text box, pure HTML page

Viewed: 47883 times

Rating (9 votes):

2.2 out of 5

Rate this Article

Read Comments

Post Comments

Validate Date

Select All Code

<script language="JavaScript">
function FormatDate(InpDate)
{
if(InpDate == "")
    {
    alert("Enter the Date field");
    return false;
    }
else
   {
      if(InpDate.length < 6) 
    {
         alert("Enter Correct Date")
     return false;
    }
      else
      {
        InpVal = InpDate;
        SendNext = "False";
        PrevSlash = "";
        LastSlash = "";
        for(i = 0;i <= InpDate.length-1;i++)
        {
          PrevSlash = LastSlash;
          LastSlash = InpDate.substring(i,i+1);
        if((LastSlash == '/' && i == 0 ))
            {
                alert("Your Date Format is incorrect");
                return false;
                 break;    
            }
          if ((LastSlash == '/' || LastSlash == '.') && (PrevSlash == '.' || PrevSlash == '/'))
            {
                alert("Your Date Format is incorrect");
                return false;
                 break;
            }
          else 
            {
                if (LastSlash == '/' || LastSlash == '.') 
                SendNext = "True";
            } 
       } 
    if (SendNext == "True") 
        {
            lBool="False";
            LMonth="False";
            LDate="False";
            var OutVal;
            var InVal;
            var RoundYear;
            var Mon;
            var LastSlashNumber;
            var j;
            var k;
            var x;
            x = InpDate;
            OutVal="";
            TotVal="";
            LastSlashNumber=0;
            for(i = 0;i <= x.length-1;i++) 
               {
                  LastSlash = x.substring(i,i+1);
                  if (LastSlash != 0 && LastSlash != 1 && LastSlash != 2 && LastSlash != 3 && LastSlash != 4 && LastSlash != 5 && LastSlash != 6 && LastSlash != 7 && LastSlash != 8 && LastSlash != 9 && LastSlash != '/' && LastSlash != '.') //fifth if
                    {
                        lBool="True";
                        break;
                    }
                  else 
                    {
                      if (LastSlash == '/' || LastSlash == '.' || LastSlashNumber == 2 ) //sixth if
                          {
                            InVal = OutVal;
                            if (InVal == '0' || InVal == '00' || InVal == '0000') //seventh if
                                {
                                    alert("You entered Some Zero's in the field(Month/Date/Year)")
                                    return false;
                                    break;
                                }
                                TotVal = TotVal+InVal
                                OutVal="";
                                   if (LastSlashNumber == 0  )
                                    {
                                        LastSlashNumber  = LastSlashNumber + 1;
                                        Mon = InVal;
                                        if (InVal > 12)
                                            {
                                                LMonth ="True";
                                                InVal="";
                                                break;
                                            }
                                    }
                               else
                                    {
                                           if(LastSlashNumber == 1)
                                            {
                                                Dat = InVal;
                                                LastSlashNumber  = LastSlashNumber + 1;
                                                if(Mon == '01' || Mon == '1' || Mon == '03' || Mon == '3' || Mon == '05' || Mon == '5' || Mon == '07' || Mon == '7' || Mon == '08' || Mon == '8' || Mon == '10' || Mon == '12')
                                                    {
                                                          if (InVal > 31)
                                                            {
                                                                  LDate ="True";
                                                                   InVal="";
                                                                  break;
                                                            }
                                                    }
                                                else
                                                       {
                                                        if(Mon == '04' || Mon == '4' || Mon == '06' || Mon == '6' || Mon == '09' || Mon == '9' || Mon == '11')
                                                           {
                                                                if (InVal > 30)
                                                                    {
                                                                          LDate ="True";
                                                                           InVal="";
                                                                          break;
                                                                    }
                                                            }        
                                                          }
                                            }
                                    else
                                        {
                                            if(LastSlashNumber == 2 )
                                                   {
                                                    LastSlashNumber = LastSlashNumber + 1;
                                                    lYear = x.substring(TotVal.length+2,x.length);
                                                    if(lYear == '0000')
                                                        {
                                                            alert("You entered Some Zero's in the field(Month/Date/Year)")
                                                            return false;                        
                                                        }
                                                    else
                                                        {
                                                            if(lYear.length <= 3 )
                                                                {
                                                                    alert("Enter Four digits for Year");
                                                                    return false;
                                                                    break;
                                                                }
                                                            else
                                                                {
                                                                       if(lYear.length > 4 )
                                                                        {
                                                                            alert("Enter Four digits for Year");
                                                                            return false;
                                                                            break;
                                                                        }
                                                                       else
                                                                        {
                                                                             RoundYear = Math.round(lYear/4); 
                                                                             if (lYear/4 != RoundYear) 
                                                                                {
                                                                                    if(Mon == 2 && Dat > 28 )
                                                                                        {
                                                                                            alert("You entered More than 28 in the date field (it's not a leap year)");
                                                                                            return false;
                                                                                            break;
                                                                                        }
                                                                                    else
                                                                                    {
                                                                                    alert("Entered Date is Correct");
                                                                                    return true;
                                                                                    }
                                                                                   }
                                                                            else
                                                                                   {
                                                                                    if(Mon == 2 && Dat > 29)
                                                                                        {
                                                                                            alert("You entered More than 28 in the date field/month is febraury");
                                                                                            return false;
                                                                                            break;
                                                                                        }
                                                                                    else
                                                                                        {
                                                                                        alert("Entered Date is Correct");
                                                                                        return true;
                                                                                        }
                                                                                   }
                                                                        }
                                                                }
                                                           }
                                                }    
                                                else
                                                {
                                                alert("Entered Date is Correct");
                                                return true;
                                                }
                                            }
                                       }
                                }
                                       else
                                        OutVal=OutVal + LastSlash;
                            }
                        }
                    }
            else
                {
                    alert("You Date format is incorrect");
                    return false;
                }
             }
    }
    if (lBool == "True")
        {
            alert("You entered some alpha value in the Date field");
            return false;
        }
    else
        {
            if (LMonth == "True")
                {
                    alert("Your Month is invalid");
                    return false;
                }
            else
                {
                    if (LDate == "True")
                        {
                            alert("Your Date is invalid");
                            return false;
                        }
                    else
                        {
                        alert("Entered Date is Correct");
                        return true;
                        }
                }
        }
}
</script>

Useful Links

Fat Cow Hosting

FatCow Review

Advertise here

CodeToad Experts

Can't find the answer?
Our Site experts are answering questions for free in the CodeToad forums

Rate this article: Poor Excellent

View highlighted Comments

User Comments on 'Validate Date'

Posted by : Archive Import (Raef Abdallah) at 18:56 on Thursday, July 24, 2003

I changed line 10 from
if (InpDate.length < 6) to
if (InpDate.length < 10).

This way entering '12/12/' for example in the text box will be an invalid date. This script is very helpful.

Thanks,

Raef

Posted by : Archive Import (Raef Abdallah) at 19:13 on Thursday, July 24, 2003

Line 10 should be changed to
if (InpDate.length < 8).

This will make

'5/3/2003' , '05/3/2003' , '05/03/2003', etc.. valid dates.

Raef

Posted by : Archive Import (M Danyov) at 09:08 on Tuesday, August 26, 2003

let me know if this works

Posted by : Archive Import (Aries Jay) at 14:46 on Wednesday, September 17, 2003

this works absolutely fine..and very easy

Posted by : difase20_1984 at 20:11 on Monday, June 13, 2005

saw some bugs

such date causes a correct output
10/10/10/1

Posted by : Raef at 19:01 on Friday, June 24, 2005

You're right about the bug. An easy fix would be to use a regular expression. You can add the lines below after the second "else" statement. The lines are as follows:

var regExpressionPhonePrefix = /\d\d\d\d/;
if((f.date.value.length > 6 ) && (!regExpressionPhonePrefix.test(f.date.value.substring(6,f.date.value.length+1)))) // try +1 instead of -1 (isNaN(f.date.value.substring(6,f.date.value.length-1))))
{

alert("That is a year for God's Sake");
return false;
break;
}

That will accept any four digit year. That's all Folks!

Posted by : Raef at 20:40 on Friday, June 24, 2005

Just a follow up on my previous post. Just a clean up!

var regExpressionYear = /\d\d\d\d/;
if((f.date.value.length > 6 ) && (!regExpressionYear.test(f.date.value.substring(6,f.date.value.length+1))))
{
alert("That is a year for God's Sake");
return false;
break;
}

Happy Programming!

To post comments you need to become a member. If you are already a member, please log in .

RELATED ARTICLES
Image Submit Button by Jeff Anderson You can keep your forms from slipping into mundanity by substituting the default gray submit button to a colourful graphic of your choosing.

Parent _self _blank and _top Frame Target Specifications by Jeff Anderson How to specify frames and how to break out of them using standard link tags.

Pre Tag by Jeff Anderson No need to reformat text files with line breaks and tabs if you use the pre tag

Image Rollovers by Jeff Anderson A bit of code to swap to different images on the page. You often see this on sites to display a rollover on the navigation buttons.

ASCII characters and their codes by Jeff Anderson A full list of all the ASCII characters.

In-Line Frames (IFrames) by Jeff Anderson Inline frames or IFrames are the ones which appear in the midst of a standard page, but actually reference a totally separate url.

Validate Date by Kannadasan Ramiah Validating Date entered in a text box, pure HTML page

HTML Hspace and Vspace Image Borders by Jeff Anderson A lesser known feature in HTML is the ability to add a blank border around images both horizontally and vertically.

Creating Navigation with Frames by Jeff Anderson The most popular use of frames is to allow a static navigation to stay on one part of the screen (in one frame) while the content changes in another.

The OSI Reference Model - A Clear and Concise Illustration ! by James Opiko The OSI Reference Model - A Resource For IT Certification Candidates & Networking Professionals

Recent Forum Threads

•	Significant Factors
•	Perl array access
•	Re: huffman encoding and decoding in C++...
•	Perl One Liner: Replace {(
•	Re: html including php, accessing the functions
•	Something like an INI editor or a DelimitedText-Editor
•	Error Deleting File or Folder
•	Re: How can use ASP.NET RegularExpressionValidator for alphanumeric 10 digit input
•	Re: drop-down menu selected value

Recent Articles

	ASP GetTempName
	Decode and Encode UTF-8
	ASP GetFile
	ASP FolderExists
	ASP FileExists
	ASP OpenTextFile
	ASP FilesystemObject
	ASP CreateFolder
	ASP CreateTextFile
	Javascript Get Selected Text

submit a link - privacy - contact - advertise - hot links - link to us - submit your article