使用ajax的跨域请求不起作用

Question

我正在尝试使用ajax请求从我的本地域重定向到paypal结帐域。我也允许跨域为true.but我收到错误

  No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin      'http://localhost' is therefore not allowed access. 

我的代码是：

$.ajax({
            type: 'GET',
            url: ' https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-2YA61167F0197144Y',
            processData: false,
            crossDomain: true,
            contentType: "application/json",
            jsonp: false,
            success: function() {
                alert("Success");
            },
            error: function() {
                alert("failure");
            }
    });