jQuery validation plugin not validating the fields onblur and onkeyup

If you want trigger jQuery validation onkeyup and onfocusout event, you must add following two jQuery validation methods to your validation script.

onkeyup: function(element) { $(element).valid(); },
onfocusout: function(element) { $(element).valid(); },

See the jQuery validation demo script.

$("#register").validate({
 submitHandler : function(form) {
  $('input:submit').attr('disabled', 'disabled');
  form.submit();
 },
 onfocusout: function (element) { $(element).valid();},
 onkeyup: function(element) { $(element).valid(); },
 rules : {
 },
 messages : {
 }
});

If above script not trigger jQuery validation onkeyup and onfocusout event. Trigger validation this way.

$(document).on('keyup blur click', '#formId input, #formId select, #formId textarea',function(){
 $(this).valid();
});

You may also refer following tutorials jquery validation.

PHP Quiz Application Using jQuery Ajax MySQL and Bootstrap