使用$ .ajax进行发布不起作用

Well, the problem is not new, as I saw (really surf a lot), but still can not find solution for myself.

Description of problem:

1. Have local Web server - XAMPP;
2. Firefox 29.0.1

3. And trying to send POST with $.ajax

   function checkUser(){
     $.ajax({
       type: 'POST',
       url: 'ajax/checkUser.php',
       data: 'uname='+$("#username").val()+'&pword='+$("#password").val(),
       success: function(){
         someNewFunc();
       },
     });
   };
   

This function I'm calling with:

$(document).ready(function(){
        $(".button.postfix.login").on("click", function(){
        if (($("#username").val() != "") && ($("#password").val() != "")) {
            hide(); <-- hide pop ups about empty field
            checkUser();    
        } else {$("#empty").show();} <-- pop ups 
        });
    });

And here code of page with elements:

<input id="username" type="text" placeholder="Username" />
<input id="password" type="password" placeholder="Password" />

<a class="button postfix login" href="#" 
onclick="event.preventDefault();">Sign in</a>

I guess that data are going out, but the page checkUser.php doesn't get anything. What am I doing wrong?

P.S. checkUser.php:

<?php
print_r($_POST);
?>

Result - Array ( )

P.P.S. By the way, if POST change to GET it's working, but need to be POST

Does your someNewFunc callback fire? Do you see the HTTP AJAX request in the developer console in Firefox?

Try sending your post data as a dictionary to $.ajax:

$.ajax({
  type: 'POST',
  data: {
    uname: $("#username").val(),
    pword: $("#password").val()
  }
});

$(document).ready(function(){

$(".button.postfix.login").on("click", function() {

    var username = $("#username").val();
    var password = $("#password").val();

if ((username != "") && (password != "")) {
    hide(); <-- hide pop ups about empty field
    checkUser(username, password); // Pass the variables here as a parameter
} else {
    $("#empty").show();} <-- pop ups 
});

// Put the parameters here
function checkUser(username, password) {

  $.ajax({
    type: 'POST',
    url: 'ajax/checkUser.php',
    data: { username:username, password:password} //It would be best to put it like that, make it the same name so it wouldn't be confusing
    success: function(data){
       alert(data);
    },
  });
};

});

So when you're gonna call it on php

$username = $_POST['username'];

echo $username;