<form action="${updatePassword}" method="post" class="form-signin" id="form-signin">

   <div class="form-group">
   <input type="password" id="password" name="password" placeholder="Enter new Password..." class="form-password form-control">
</div>
 <div class="form-group">
    <input type="password" name="confirmpassword" placeholder="Confirm Password..." class="form-password form-control" id="confirmpassword"> </div>
        <button type="submit" class="btn" id="submit" name="submit> Reset password</button></form>

$(function () {$("#submit").click(function ()  //input button click
    {
         $.validator.setDefaults({
               debug: true,
               success: "valid"
           });

                 $("#form-signin").validate({
               rules: {
                   password: {
                     required: true,
                     minlength: 5

                   } ,

                       confirmpassword: {
                        equalTo: "#password"
                   }

               },
               messages: {
                   password: {
                       required: "Inserire una password",
                       minlength: "La password deve contenere almeno 5 caratteri"
                   },
                   confirmpassword: {
                       equalTo: "Le due password devono coincidere"
                   }
               }

           });
        });
        });