question about jQuery inline form validation

Question

Here is a link on jQuery inline form validation that I'm trying to use http://www.position-absolute.com/articles/jquery-form-validator-because-form-validation-is-a-mess/

Everything looks good but I have a small problem

I have an input where I use this kind of validation

'validate[length[6,15]]'

It checks if number of length of input value and if it is less then 6 or grater then 15 gives and error.

Now what I want is to add there chance for input to have value length=0 , so the validation won't fire any error message.

Is that possible ?

UPDATE

This is submit blocking function

<script type='text/javascript'>
  $(document).ready(function() {
$('#standart_form').validationEngine();
 $('#standart_form').submit(function() {
  return false;
 });
 });
  </script>

Now when I was using this 'validate[length[6,15]]' everything was working good. But If I try using new custom functions the whole forms submits itself ruining my ajax based application.

Answer 1

The plugin you're using doesn't support this out of the box, but its customization features allows you to implement that behavior yourself.

For instance, you can specify a regular expression to be used when validating a field. You'll need to add it to your translation file:

"emptyOrLengthBetween6And15": {
    "regex": /^$|^.{6,15}$/,
    "alertText": "* Empty, or between 6 and 15 characters long"
},

Then you can refer to it in a custom validator:

class="validate[custom[emptyOrLengthBetween6And15]]"

You can also write your own validation function:

function checkEmptyOrLengthBetween6And15(field, rules, i, options)
{
    var val = field.val();
    if (val.length > 0 && (val.length < 6 || val.length > 15)) {
        return "* Empty, or between 6 and 15 characters long";
    }
}

Then use it in a funcCall validator:

class="validate[funcCall[checkEmptyOrLengthBetween6And15]]"