I have this code from a different code where i am trying to gigure out how can i add make this code as working additional method for my jquery validator

$.addMethod('allowing',{
    validatorFunction: function (val, $el, conf) {
      if (val !== '') {
        var allowing = $el.valAttr('allowing') || '',
          decimalSeparator = $el.valAttr('decimal-separator') || conf.decimalSeparator,
          allowsRange = false,
          begin, end,
          steps = $el.valAttr('step') || '',
          allowsSteps = false,
          sanitize = $el.attr('data-sanitize') || '',
          isFormattedWithNumeral = sanitize.match(/(^|[\s])numberFormat([\s]|$)/i);

        if (isFormattedWithNumeral) {
          if (!window.numeral) {
            throw new ReferenceError('The data-sanitize value numberFormat cannot be used without the numeral' +
              ' library. Please see Data Validation in http://www.formvalidator.net for more information.');
          }
          //Unformat input first, then convert back to String
          if (val.length) {
            val = String(numeral().unformat(val));
          }
        }

        if (allowing.indexOf('number') === -1) {
          allowing += ',number';
        }

        if (allowing.indexOf('negative') === -1 && val.indexOf('-') === 0) {
          return false;
        }

        if (allowing.indexOf('range') > -1) {
          begin = parseFloat(allowing.substring(allowing.indexOf('[') + 1, allowing.indexOf(';')));
          end = parseFloat(allowing.substring(allowing.indexOf(';') + 1, allowing.indexOf(']')));
          allowsRange = true;
        }

        if (steps !== '') {
          allowsSteps = true;
        }

        if (decimalSeparator === ',') {
          if (val.indexOf('.') > -1) {
            return false;
          }
          // Fix for checking range with floats using ,
          val = val.replace(',', '.');
        }
        if (val.replace(/[0-9-]/g, '') === '' && (!allowsRange || (val >= begin && val <= end)) && (!allowsSteps || (val % steps === 0))) {
          return true;
        }

        if (allowing.indexOf('float') > -1 && val.match(new RegExp('^([0-9-]+)\\.([0-9]+)$')) !== null && (!allowsRange || (val >= begin && val <= end)) && (!allowsSteps || (val % steps === 0))) {
          return true;
        }
      }
      return false;
    },
    errorMessage: '',
    errorMessageKey: 'badInt'
  });

but this function seems to be failing in all ends

please guide

do i need to follow somthing in this or i need to reformat this entire function to fix it