我有两个问题！
1st：在我的页面上有更多引导表单（loginFrom，signUpForm，...），如果我点击loginForm提交的提交按钮，但signUpForm NOT和submit（ ）根本没有调用signUpForm的函数。 结构是一样的，所以我不知道为什么？可能是什么问题？
大部分内容都在PHP文件中，因为我将它们包含在一起。 （多页网站）
modal.php
<form id="loginModal" method="post" name="loginModal" class="modal fade modal-full-height" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" data-backdrop="static">
<div class="modal-dialog cascading-modal" role="document">
<!--Content-->
<div id="loginModalDiv" class="modal-content">
<!--Header-->
<div class="modal-header myModalHeader">
<h4 class="title"><i class="fa fa-user-lg"></i> Login:</h4>
</div>
<!--Body-->
<div class="modal-body">
<div class="md-form form-sm">
<i class="fa fa-envelope prefix"></i>
<input type="text" id="logF_email" name="email" class="form-control">
<label for="logF_email">E-mail address:</label>
</div>
<div class="md-form form-sm">
<i class="fa fa-lock prefix"></i>
<input type="password" id="logF_passw" name="password" class="form-control">
<label for="logF_passw ">Password:</label>
</div>
<div class="text-center mt-2">
<div id="errorLogin"></div>
<button id="btnLogin" type="submit" name="submitLogin" class="btn btn-default myModalBtn">Login <i class="fa fa-sign-in ml-1"></i></button>
</div>
</div>
<!--Footer-->
<div id="footerLogin" class="modal-footer">
<div class="options text-center text-md-center mt-1">
<p>You don't have an account? <a class="loginToSignUp myGreenClass" data-toggle="modal" href="#"> Sign up!</a></p>
<p>Forget <a class="forgetPassword myGreenClass" data-toggle="modal" href="#"> password?</a></p>
</div>
<button type="button" class="btn btn-outline-default waves-effect ml-auto myModalBtn" data-dismiss="modal">Close</button>
</div>
</div>
<!--/.Content-->
</div>
</form>
<form id="signUpModal" method="post" name="signUpModal" class="modal fade modal-full-height" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true" data-backdrop="static" data-keyboard="false">
<div class="modal-dialog cascading-modal" role="document">
<!--Content-->
<div id="signUpModalDiv" class="modal-content">
<!--Header-->
<div class="modal-header myModalHeader">
<h4 class="title"><i class="fa fa-user-plus"></i> Sign up:</h4>
</div>
<!--Body-->
<div class="modal-body">
<div class="md-form form-sm">
<i class="fa fa-envelope prefix"></i>
<input type="text" id="regF_email" name="email" class="form-control">
<label for="regF_email">E-mail address:</label>
</div>
<div class="row mx-auto" style="width: 50%;">
<span id="passLED1" value='red' class="passCheck badge badge-danger col-sm-2 m-auto mx-1">a-z</span>
<span id="passLED2" value='red' class="passCheck badge badge-danger col-sm-2 m-auto mx-1">A-Z</span>
<span id="passLED3" value='red' class="passCheck badge badge-danger col-sm-2 m-auto mx-1">0-9</span>
<span id="passLED4" value='red' class="passCheck badge badge-danger col-sm-2 m-auto mx-1">[0]</span>
</div>
<div class="md-form form-sm">
<i class="fa fa-lock prefix"></i>
<input type="password" id="regF_passw" name="passwordReg" class="form-control">
<label for="regF_passw">Password:</label>
</div>
<div class="md-form form-sm">
<i class="fa fa-lock prefix"></i>
<input type="password" id="regF_passwConf" name="passwordRegConfirmation" class="form-control">
<label for="regF_passwConf">Confirmation password:</label>
</div>
<div class="text-center mt-2">
<div id="errorSignUp"></div>
<button id="btnSignUp" type="submit" name="submitSignUp" class="btn btn-default myModalBtn">Sign up!<i class="fa fa-sign-in ml-1"></i></button>
</div>
</div>
<!--Footer-->
<div id="footerSignUp" class="modal-footer">
<div class="options text-center text-md-center mt-1">
<p>Do you have an account? <a class="signUpToLogin myGreenClass"href="#"><br>Log in!!</a></p>
</div>
<button type="button" class="btn btn-outline-default waves-effect ml-auto myModalBtn" data-dismiss="modal">Close</button>
</div>
</div>
<!--/.Content-->
</div>
</form>
validation.js
//Login form
$("#loginModal").submit(function(){ // OK
console.log('fut');
var errorMsg = "";
errorMsg += checkEmailField('#logF_email');
errorMsg += checkPasswordField('#logF_passw');
if (errorMsg == "") { $('#errorLogin').html('<div class="alert alert-success" role="alert">Please wait...</div>');
$('#loginModalDiv *').prop('disabled',true); $('#footerLogin').hide();
return true;}
else {$('#errorLogin').html('<div class="alert alert-danger" role="alert"><big>An error occurred while logging in!</big>' + errorMsg + '</div>'); return false;}
});
//Sign-up Form
// check the fields when the button is clicked!
// $(document).on('click', '#btnSignUp', function(event){
$("#signUpModal").submit(function(){
console.log('fut');
var errorMsg = "";
errorMsg += checkEmailField('#regF_email');
errorMsg += checkPasswordField('#regF_passw', 'regF_passwConf');
if (errorMsg == "") { $('#errorSignUp').html('<div class="alert alert-success" role="alert">Please wait...</div>');
$('#signUpModalDiv *').prop('disabled',true); $('#footerSignUp').hide();
return true;}
else {$('#errorSignUp').html('<div class="alert alert-danger" role="alert"><big>An error occurred while sending request!</big>' + errorMsg + '</div>'); return false;}
});
第二名：点击提交按钮（LoginForm）后，页面会刷新，但我无法从＆＃39; $ _ post＆＃39;中提取任何数据。变量
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
$mail = $_POST['email'];
$password = $_POST['password'];
...
或
if ( $_POST ){
或
if (!empty($_POST)){
我没有任何解决方案尝试了很多变化。请帮助！