$.ajax({

if (document.getElementById("facebook-jssdk")) { //if set, reset
                    //removes the <script>

                    document.head.removeChild(document.getElementById("facebook-jssdk"));

                    delete window.FB; //unloads the APIs
                    delete window.fbAsyncInit;
                    delete window.fbq;
                    delete window._fbq
                    delete window.loaded;



                    setTimeout(function() {

                        $.getScript("https://intentwarenow.com/fb_messenger.js", function() {

                            //adding html here

                        });
                    }, 3000);




                } else {
                    $.getScript("https://intentwarenow.com/fb_messenger.js", function() {
                        //adding html here
                    });
                }

            }
        });