*中间****代替

<div id="phone">1888888888</div>                

<script type="text/javascript">
    // 产品展示
    fcncpzs();
    $(function() {

    var phone = $('#phone').text();

    var nPhone = phone.substr(0, 3) + '****' + phone.substring(7, 11)


    $('#phone').text(nPhone);

});

</script>

效果：188****8888