$.validator.addMethod('phone', function(value, element) { return this.optional(element) || /^[\-\+0-9]{7,}$/.test(value); });
$.validator.addMethod('kwota', function(value, element) { return this.optional(element) || /^[\-\+0-9]{1,}[.|,]{0,1}[\-\+0-9]{0,2}$/.test(value); });
$.validator.addMethod('kodpocztowy', function(value, element) { return this.optional(element) || /^[\-0-9]{5,6}$/.test(value); });