send email after facebook comment is posted - facebook

Question

I have this code:
$output = '<div id="fb-root"></div>
<script> window.fbAsyncInit = function() {
FB.init({
appId : "xxx",
status : true,
cookie : true,
oauth : true,
xfbml : true
});
$(window).load(function(){
FB.Event.subscribe("comment.create", function(response) {
var data = {
action: "fb_comment",
url: "xxx.com"
};
$.post( "mail.php", data );`
});
});
};
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, "script", "facebook-jssdk"));</script>
<div class="fb-comments" data-href="'. $url .'" data-num-posts="'. $amount .'" data-notify="true" data-width="'. $width .'" data-colorscheme="'.$style.'"></div>';
And then the send email code in the mail.php file. (This code works)
I think the issue is the FB.Event.subscribe code, I can't figure out how to call the mail.php file to send the email only when a comment is posted.
I have placed the code in the facebook_comments_module file of the facebook_comments module from drupal. (my site is a drupal site)

Answer 1

This worked:
`$output = '<div id="fb-root"></div>
<script> window.fbAsyncInit = function() {
FB.init({
appId : "xxx",
status : true,
cookie : true,
oauth : true,
xfbml : true
});
/* All the events registered */
FB.Event.subscribe("comment.create", function(response) {
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","../xxx/mail.php?response1="+ response.href,true);
xmlhttp.send();
});
};
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, "script", "facebook-jssdk"));</script>
<div class="fb-comments" data-href="'. $url .'" data-num-posts="'. $amount .'" data- notify="true" data-width="'. $width .'" data-colorscheme="'.$style.'"></div>';`