好的…类似这样的东西…但是我没有尝试过…所以像教程一样使用它。您也可以使用json

js：

function processForm() { 
        $.ajax( {
            type: 'POST',
            url: form_process.php,
            data: 'user_name=' + encodeURIComponent(document.getElementById('user_name').value),
            success: function(data) {
                $('#message').html(data);
            }
        } );
}

HTML：

<form action="" method="post" onsubmit="processForm();return false;">
<input type='text' name='user_name' id='user_name' value='' />
<input type='submit' name='submit' value='submit'/>
</form>
<div id='message'></div>

form_process.php

$user_name = $_POST['user_name'];
if(do something){
     echo "login success";
else{
     echo "login unsuccessful";
}