Log click

Hello! I need to log some links with this plugin (I need this way, not alternative plugins) so I made this:

my content page
<a it="test-tracking1" href="#" class="track">Test Tracking</a>

theme footer.php

<script type="text/javascript">

$(document).ready(function() {
    $(".track").click(function() { tracklink(); });
});

 function tracklink(el) {
    var the_id = $(el).attr("id");
    var test = "test";
     $.ajax({
         type: "POST",
         url: 'functions.php',
         data:{action:'track', nome:'<?php echo $trackinguser; ?>', titolopagina:'<?php echo $trackingtitle; ?>', pulsante: the_id},
         success:function(html) {}
     });
};
</script>

theme functions.php

if($_POST['action'] == 'track') {

$linktrackingtitle=$_POST['titolopagina'];
$linktrackinguser=$_POST['nome'];
$linktrackingbutton=$_POST['pulsante'];

do_action( 'wp_log_info', 'Click', $linktrackinguser . ' ha cliccato su ' . $linktrackingbutton . ' in ' . $linktrackingtitle );
}

But it doesn’t work… What’s wrong?
Thank you!