AJAX POST ERROR

Pada kode dibawah ini saya mendapati error : Uncaught SyntaxError: Unexpected token .

Yang tepatnya pada baris ke 5 : $.post("<?= site_url('act/input_url_crawl');?>",

<script type="text/javascript">
    $(document).ready(function(){
        $("#crawlUrlSubmit").click(function(){
            $.ajax({
                $.post("<?= site_url('act/input_url_crawl');?>",
                {
                    url: document.getElementById("url").value,
                    crawl : "TRUE"
                },
                function(returnedData){
                    $.alert({
                        title: 'Berhasil',
                        titleClass: 'green-text',
                        content: returnedData,
                        type: 'green',
                        theme: 'supervan',
                        typeAnimated: true
                    });
                }).fail(function(){
                    $.alert({
                        title: 'Terjadi Kesalahan',
                        titleClass: 'red-text',
                        content: returnedData,
                        type: 'red',
                        theme: 'supervan',
                        typeAnimated: true
                    });
                });
            });
        });
    });
</script>

Mohon bantuannya... ^_^