Access Control Request Headers, is added to header in AJAX request with jQuery

I would like to add a custom header to an AJAX POST request from jQuery. I have tried this: $.ajax({ type: 'POST', url: url, headers: { "My-First-Header":"first value", "My-Second-Header":"second value" } //OR //beforeSend: function(xhr) { // xhr.setRequestHeader("My-First-Header", "first value"); // xhr.setRequestHeader("My-Second-Header", "second value"); //} }).done(function(data) { alert(data)

[tvsk]

POSTリクエストで ヘッダ操作する