how to check value entered in field

[madhuriks]

hi,
i m new to this site as well as to Javascript.In my project i need to use javascript..in my code if i enter the textfield 'MA' it should take along with numbers...but the problem is if i enter 'MAA' it is not showing any error..the text field should take on 'MA' not 'MAA'...i used the charAt() function...i m not getting any one can help me...its urgent...here i m sending the code..waiting for the reply...

function pasuser(form)
{
    if (form.n1.value == "")
    {
        alert("Enter Package Name");
        form.n1.focus();
        return (false);
    }
    var chk = form.n1.value;
    var chk1=chk.charAt(0);
    var allValid = true;
    if (chk1=="M")
    {
    	alert("u entered correct");
    	form.n1.focus();
    	allValid = false;
    }
    else if (!allValid)
    {
        alert("Enter only M");
        form.n1.focus();
        return (false);
    }
    form.submit();
    return true;
}

Thanks&Regards,
madhuri.

[Dormilich]

do you mean that the text field should take only "MA" or MA accompanied with numbers, like "MA12345"?

[madhuriks]

how to get checked the field

hi,
it should take 'MA123456789'.. .not 'MAA123456789'. .i tried using indexOf() and charAt()...but unable to get it...can u help me out from this....

Thanks&Regards,
Madhuri.

[Dormilich]

then I recommend that you test your string against a RegEx:

if (/^MA\d+$/.test(document.forms[0].n1.value) {
    alert("valid");
}

[madhuriks]

how to get checked the field

hi,
thanks for your reply..i tried i m not getting..if i enter wrong value i.e 'nn'..it is not showing error..here with i m sending the code can u once check it..

function pasuser(form)
{
    if (form.n1.value == "")
    {
        alert("Enter Package Name");
        form.n1.focus();
        return (false);
    }
    if (/^MA\d+$/.test(document.forms[0].n1.value))
    {
         alert("valid");
         form.nl.focus();
         return (false);
     }
    form.submit();
    return true;
}

Thanks & Regards,
madhuri.

[Dormilich]

this might be an addressing issue (the part before .value), because I don’t know your form setup.