Validate if checkbox is checked using really easy validation

/ Needs Really easy validation.js script & prototype.js /

function validateIfChecked(v, e) {
    var cbId = e.getAttribute(‘usecheckbox’);
    if (cbId != ‘undefined’) {
         if ($(cbId).checked) {
            var validationType = getValidationType(e);
            return !Validation.get(‘IsEmpty’).test(v) && Validation.get(validationType).test(v)
        }
         else {
              $(e).value = ‘’;
              return true;
         }
    }
    return true;
}

function getValidationType(e) {
    var classes = e.className.split(‘ ’);
    for (i = 0; i < classes.length; i++) {  
        if (classes[i].indexOf(‘validate-checkbox-’ >= 0))
              return classes[i].replace(‘validate-checkbox-’, ‘’);
    }
    return ‘validate-number’; // default;
}

Validation.add(‘validate-checkbox-required’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-number’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-digits’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-alpha’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-alphanum’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-date’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-email’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-url’, ‘Please provide a valid value when checked’, validateIfChecked);
Validation.add(‘validate-checkbox-validate-currency-dollar’, ‘Please provide a valid value when checked’, validateIfChecked);

Realy Easy Validation