text box to validate only years

Question

1.20/5 (3 votes)

See more:

JavaScript

function isNumberKey(evt, obj) 
         {
            var LIMIT = 5;
            var charCode = (evt.which) ? evt.which : event.keyCode
            var txt = obj.value.length;
            if ((txt == LIMIT) && (charCode == 8)) {
                obj.value = obj.value.toString().substring(0, txt-1);
            }
            if (charCode > 31 && (charCode < 48 || charCode > 57))
                return false;
            else {
                if (txt < LIMIT) {
                    return true;
                }
                else {
                    return false;
                }
            }
        }

HTML

<INPUT id="txtChar" >

Posted 17-Nov-15 19:33pm

Member 12148433

Updated 17-Nov-15 19:44pm

Maciej Los

v2

Add a Solution

Comments

Maciej Los 18-Nov-15 1:44am

What's the question?

Suvendu Shekhar Giri 18-Nov-15 1:46am

..and what is the problem?

Patrice T 18-Nov-15 3:18am

And you have a question ? a problem ?

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

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

Member 11011853 · Answer 1 · 2015-11-17T21:07:00

XML

<html>
<head>
<title>Year Validation-JAVASCRIPT</title>

<script type="text/javascript">
// checks to see if the data passed in is a 4 digit year between now and 1900
function checkIsValidYear(_data)
{
 var _thisYear = new Date().getFullYear();

 if (_data.length != 4){
        alert( "This is not valid");
        return false;
    }

 if (!_data.match(/\d{4}/)){
    alert( "This is not valid");
     return false;
    }

 if (parseInt(_data) > _thisYear || parseInt(_data) < 1900){
    alert( "This is not valid");
    return false;
    }

 return true;
}
</script>
</head>
<body>
<form name="myForm">
<input type="text" name="theYear" maxlength="4" value="" onchange="return checkIsValidYear(this.value) ;"/>
</body>
</html>