1$.ajax({
2    url: "/test",
3    headers: {"X-Test-Header": "test-value"}
4});

1$.ajax({
2         url: "http://localhost/myawsomecode/",
3         data: { param1: 'anyvalue', param2: 'othervalue' },
4         type: "GET",
5         beforeSend: function(xhr){xhr.setRequestHeader('X-Test-Header', 'SetHereYourValueForTheHeader');},
6         success: function() { alert('Success!'); }
7      });