单击按钮，使用ajax运行php函数

I want to run my php function when I click on this button, This works fine on Chrome and Firefox, But not on Safari, I don't know why :( Please help me...

My PHP Function is : complete_automate_xml(); My Button is : <button id="btn" onclick="alertWithoutNotice();" class="deletebtn button button-next">Verstuur E-mails</button> My Code is :

<script>
    jQuery(document).ready(function($) {
    $('#btn').click(function(){

        $.ajax({
            type: "POST",
            url: '../wp-admin/admin.php?page=spd_xml_importer',
            data: {action: 'call_this'},
            success: function (html) {
                alert(html);
            }

        });
    });
});
</script>
<div class="email-bt">
    <script>function alertWithoutNotice(message) {
            setTimeout(function () {
                alert('E-mails zijn verzonden');
            }, 300);
        }</script>
        <button id="btn" onclick="alertWithoutNotice();" class="deletebtn button button-next">Verstuur E-mails</button>
</div>
<?php
if ($_POST['action'] == 'call_this') {
    complete_automate_xml();
}

i was thinking more like this - but I'm not 100% sure this is the issue with Safari I just wondered whether there was confusion in the browser as to which function to invoke.

<script>
    jQuery(document).ready(function($) {
    $('#btn').click(function(){
        setTimeout(function() {
            alert('E-mails zijn verzonden');
        }, 300);

        $.ajax({
            type: "POST",
            url: '../wp-admin/admin.php?page=spd_xml_importer',
            data: { action: 'call_this' },
            success: function (html) {
                alert(html);
            }
        });
    });
});
</script>
<div class="email-bt">
        <button id="btn" class="deletebtn button button-next">Verstuur E-mails</button>
</div>