Wrapper around the javascript VAT validator from John Gardner (http://www.braemoor.co.uk/software/vat.shtml)

function checkVATNumber(vatNumber)

Parameters:

• VATNumber: VAT number to be checked.

Returns:

• reformatted VAT number if valid
• false if invalid

Usage (using RequireJS):

  var checkVATNumber = require('bower/js-vat-validator/lib/validator');

  checkedVatNumber = checkVATNumber(vatNumber);

  if (vatNumber) {
      alert("reformatted valid VAT number: " + checkedVatNumber)
  } else {
      alert ("Invalid VAT number: " + vatNumber);
  }