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#divLoading
{
    display : none;
}
#divLoading.show
{
    display : block;
    position : fixed;
    z-index: 100;
    opacity : 0.4;
    background: #666 no-repeat center;
    left : 0;
    bottom : 0;
    right : 0;
    top : 0;
}
#loadinggif.show
{
    left : 50%;
    top : 50%;
    position : absolute;
    z-index : 101;
    margin-left : -16px;
    margin-top : -16px;
}

$('div#divLoading').addClass('show');
    $.ajax({
     url: 'http://api.ipify.org/?format=json',
        type:"GET",
        success: function (data) {

         mesaj += "<br/><br/><br/><b>"+"İp Adres = </b>" + data.ip + "";

            $.ajax({
                url: 'http://www.turkuazdestek.com/atolyeNotlariEmailTest/sendEmail.php',
                type: "POST",
                data: {mesaj: mesaj},
                success: function (response) {
                    $('div#divLoading').removeClass('show');
                    alert(response);
                }
            });
        }
    });

<div id="divLoading" class="col-md-12 text-center">
        <div class='uil-ripple-css center-block' id="loading" style='transform:scale(0.7);'><div></div><div></div></div>
    </div>

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