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Check if 4 digits is entered...

Posted on 2011-02-21
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Last Modified: 2012-05-11
Hi!

Have a script that the user must enter a value.
But he/she can enter text or numbers...

I like this script to validate the input from the user to:

MUST enter 4 numbers -> example: 3100 , 3288 , 6655 ...

If user dosent enter 4 numbers, the script must tell user to enter
a 4 digit number...

How do i modify my script to do this ?


<script type="text/javascript">
//<![CDATA[
    var showPrompt = function(href){
     husk_postnr2=prompt("Legg inn postnummer");
            if (husk_postnr2!=""&&husk_postnr2!=null){
                 window.location=href+"&postnr="+husk_postnr2;
	    }
        return false;
    }
//]]>
</script>

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Question by:team2005
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3 Comments
 
LVL 39

Accepted Solution

by:
Pratima Pharande earned 2000 total points
ID: 34941530
try

function checkpostcode(form)
{
var min = 4;
var numberFormat = /^\d{4}$/;

if (form.postcode.value.length == min)
{
if (numberFormat.test(form.postcode.value)
{
return true;
}
else
{
alert("Please enter a 4-digit postcode");
return false;
}
}
else
{
alert("Please enter a 4-digit postcode");
return false;
}
}


refer
http://bytes.com/topic/javascript/answers/90985-validate-form-4-digit-integer
0
 
LVL 2

Author Closing Comment

by:team2005
ID: 35122761
thanks
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