logout.js

$(document).on("click",'#button_logout',function(){
try {
        $.ajax({
  url:"http://your_url/services/session/token",
  type:"get",
  dataType:"text",
  error:function (jqXHR, textStatus, errorThrown) {
   alert(jqXHR);
   alert(textStatus);
   // alert(errorThrown);
  },
  success: function (token) {
        // Call system connect with session token.
    $.ajax({

     url: "http://your_url/endpoint/user/logout.json",
     type: 'post',
     dataType: 'json',
         beforeSend: function (request) {
        request.setRequestHeader("X-CSRF-Token", token);
      },
     error: function (jqXHR, textStatus, errorThrown) {
       alert('button_logout - failed to logout');
       alert(JSON.stringify(jqXHR));
       alert(JSON.stringify(textStatus));
       alert(JSON.stringify(errorThrown));
     },
     success: function (data) {
       alert("You have been logged out.");
       $.mobile.changePage("index.html",{reloadPage:true},{allowSamePageTranstion:true},{transition:'none'});
     }
 });
  }
});

}
catch (error) { alert("button_logout - " + error); }
});