[SH6811]

Help!

What is the proper command in Javascript to return the "length" of number of characters a user inputs into a text box on a form?

I'm trying to do this:

...

var input = FMI2FORM.PhoneNumber.value;

if(input.length > 0)
{
return true;
}

...

...and I get "length is null or not an object" error...what gives, I've seen others do this...

thank you

[GO4TF4CE]

try the following:

<form name="form1" method="post" ACTION="whatever.asp">

<input type="text" name="text1" onchange="javascript:checklength()">

</form>


<SCRIPT>
function checklength()
{

var input = form1.text1.value;

if(input.length > 0)
{
alert('The length is ' + input.length);
}

}
</SCRIPT>

as you havent posted all your code, I just made this example to show the length, you can adapt it as needed.

[TwoD]

The reason to why you get 'length is null or not an object' might be that the script is executed before the textfield has been parsed by the browser and the script can't check something which isn't there.

If you do it the way GO4TF4CE suggested you'll get around the problem easily.

[Chris Hill]

You could do it in many ways, such as if you wanted form validation, you could have:

<script language="javascript">
<!--

function check(){

if(document.form_name.object_name.value.length == 0){
alert('something');
return false;

other JS commands

}

}

//-->
</script>

<input type="submit" name="submit" onClick="return check();">

You could also have it in the form tag, <form name="something" method="post" action="URL" onSubmit="reurn check();">

}