max length validation rule in jquery validation code example

Example 1: lenght validation using jquey valisaton

jQuery.validator.addMethod("exactlength", function(value, element, param) {
 return this.optional(element) || value.length == param;
}, $.validator.format("Please enter exactly {0} characters."));

Example 2: lenght validation using jquey valisaton

$("#formtovalidate").validate({
  rules: {
    somefield: {
      exactlength: 10
    }
   });