如何使AJAX请求看起来像常规的普通请求

X-Requested-With: XMLHttpRequest

$.ajax({
    url: \'/foo\',
    type: \'POST\',
    data: { bar: \'baz\' },
    beforeSend: function(xhr) {
        xhr.setRequestHeader(
            \'X-Requested-With\',
            {
                toString: function() { return \'\'; }
            }
        );
    },
    success: function(result) {
       alert(result);   
    }
});

$.ajaxSetup({
    beforeSend: function(xhr) {
        xhr.setRequestHeader(
            \'X-Requested-With\',
            {
                toString: function() { return \'\'; }
            }
        );
    }
});