我有这个表格在我的网站上注册我的用户：
<div class="pages_container">
<form id="registerForm" method="post" class="form-horizontal">
<div class="form-group">
<label class="col-lg-3 control-label">Full name</label>
<div class="col-lg-3">
<input type="text" class="form-control" name="firstName" placeholder="First name" />
</div>
<div class="col-lg-3">
<input type="text" class="form-control" name="lastName" placeholder="Last name" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Username</label>
<div class="col-lg-6">
<input type="text" class="form-control" name="username" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Password</label>
<div class="col-lg-6">
<input type="password" class="form-control" name="password" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Retype password</label>
<div class="col-lg-6">
<input type="password" class="form-control" name="confirmPassword" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Email address</label>
<div class="col-lg-6">
<input class="form-control" name="email" type="email" />
</div>
</div>
<div class="form-group">
<label class="col-lg-3 control-label">Phone number</label>
<div class="col-lg-6">
<input type="text" class="form-control" name="phone" />
</div>
</div>
<div class="form-group">
<div class="col-lg-6 col-lg-offset-3">
<button type="submit" class="btn btn-primary btn-lg btn-block">Register</button>
</div>
</div>
</div>
</form>
</div>
我使用这个JQuery来验证表单，然后将其提交到PHP页面以存储在MySQL数据库中：
$(document).ready(function(){
//To validate the registration form and save its value after validation
$('#registerForm').bootstrapValidator({
message: 'This value is not valid',
feedbackIcons: {
valid: 'glyphicon glyphicon-ok',
invalid: 'glyphicon glyphicon-remove',
validating: 'glyphicon glyphicon-refresh'
},
fields: {
firstName: {
validators: {
notEmpty: {
message: 'The first name is required'
},
stringLength: {
min: 2,
message: 'The first name must be at least 2 characters long'
},
regexp: {
regexp: /^[a-z\s]+$/i,
message: 'The first name can consist of alphabetical characters and spaces only'
}
}
},
lastName: {
validators: {
notEmpty: {
message: 'The last name is required'
},
stringLength: {
min: 2,
message: 'The last name must be at least 2 characters long'
},
regexp: {
regexp: /^[a-z\s]+$/i,
message: 'The last name can consist of alphabetical characters and spaces only'
}
}
},
username: {
message: 'The username is not valid',
validators: {
notEmpty: {
message: 'The username is required and cannot be empty'
},
stringLength: {
min: 6,
max: 30,
message: 'The username must be more than 6 and less than 30 characters long'
},
regexp: {
regexp: /^[a-zA-Z0-9]+$/,
message: 'The username can only consist of alphabetical and number'
},
different: {
field: 'password',
message: 'The username and password cannot be the same as each other'
},
remote: {
message: 'The username is not available',
url: 'include-ajax/username_or_email_availablitiy.php',
data: {
type: 'username'
}
}
}
},
password: {
validators: {
notEmpty: {
message: 'The password is required and cannot be empty'
},
different: {
field: 'username',
message: 'The password cannot be the same as username'
},
stringLength: {
min: 8,
message: 'The password must have at least 8 characters'
},
identical: {
field: 'confirmPassword',
message: 'The password and its confirm are not the same'
}
}
},
confirmPassword: {
validators: {
notEmpty: {
message: 'The password is required and cannot be empty'
},
different: {
field: 'username',
message: 'The password cannot be the same as username'
},
stringLength: {
min: 8,
message: 'The password must have at least 8 characters'
},
identical: {
field: 'password',
message: 'The password and its confirm are not the same'
}
}
},
email: {
validators: {
notEmpty: {
message: 'The email is required and cannot be empty'
},
emailAddress: {
message: 'The input is not a valid email address'
},
remote: {
message: 'The email is not available',
url: 'include-ajax/username_or_email_availablitiy.php',
data: {
type: 'email'
}
}
}
},
phone: {
validators: {
notEmpty: {
message: 'The phone number is required'
},
digits: {
message: 'The phone number can contain digits only'
},
stringLength: {
min: 11,
max: 11,
message: 'The phone number must be 11 digits'
}
}
},
submitHandler: function(form) { // <- only fires when form is valid
$.ajax({
type: 'POST',
url: 'include-ajax/check_and_save_registration_form.php',
data: $(form).serialize(),
success: function() {alert('test');
$(form).fadeOut(500, function(){
$(form).html("USER DONE!").fadeIn();
});
}
}); // <- end '.ajax()'
return false; // <- block default form action
}
}
});
});
验证过程运行正常，但问题是在点击提交按钮后，我在控制台Uncaught TypeError: Cannot read property 'attr' of null中出现javascript错误，此错误指向bootstrapValidator.min.js:12。
说实话，这是我的第一个bootstrap代码，所以我不太了解submitHandler。
什么是arg form如果我们通过this而我们得到了什么？
脚本是否看到表单时出现错误的原因是什么？