js validation

What do you exactly want to know? Can you please be elaborate?

Hi..i provide simple text field validation using JavaScript,

<html>
<head>

<script type='text/javascript'> function formValidator()
{ // Make quick references to our fields var firstname = document.getElementById('firstname');

if(isAlphabet(firstname, "Please enter only letters for your name"))
{
return true;
}
return false;
}

function notEmpty(elem, helperMsg)
{
if(elem.value.length == 0)
{
alert(helperMsg);
elem.focus(); // set the focus to this input
return false;
}
return true;
}

</script>

</head>
<body>

<form onsubmit='return formValidator()' >
First Name: <input type='text' id='firstname' />

<input type='submit' value='Check Form' />
</form>

</body>
</html>


------------------
link removed

moorvidyaHi..i provide simple text field validation using JavaScript,

<html>
<head>

<script type='text/javascript'> function formValidator()
{ // Make quick references to our fields var firstname = document.getElementById('firstname');

if(isAlphabet(firstname, "Please enter only letters for your name"))
{
return true;
}
return false;
}

function notEmpty(elem, helperMsg)
{
if(elem.value.length == 0)
{
alert(helperMsg);
elem.focus(); // set the focus to this input
return false;
}
return true;
}

</script>

</head>
<body>

<form onsubmit='return formValidator()' >
First Name: <input type='text' id='firstname' />

<input type='submit' value='Check Form' />
</form>

</body>
</html>

@Moorvidya: Please explain me these things:
1. Where is the function isAlphabet been defined?
2. Where is firstname defined? (It is already commented out!)
3. Where is notEmpty() function called?
4. Why have you placed a link to an irrelevant website?

If you are qualified, please respond to the post. The reply you have given, copied from tizag, that too not fully, is a BS. Please don't spam a place where you are not supposed to spam! 😲 Make sure this is not happening again.

@Sanjay: Please say the fields in your form and which are need to be validated. Thanks.