JavaScript外部API调用

Question

我目前遇到的问题是对我需要调用的API进行外部GET请求，并在JSON中动态检索数据。有谁知道下面的内容可能不正确？主要问题似乎是身份验证字段的标头信息未正确设置，并且javaScript无法调出本地域。我迫切需要解决这个问题：(error: XMLHttpRequest cannot load http://www.website.com/api.php. Origin http://localhost is not allowed by Access-Control-Allow-Origin.)

function requestDealer(url)
{
    alert("looking up dealer");
var request = new XMLHttpRequest();

    $.ajax({

        url:url,
        type: 'GET',
        data: null,
        Accept : "application/json",
        contentType: "application/json",
        success: function() { alert('hello!'); },
        error: function() { alert('boo!'); },
        beforeSend: setHeader
    });
 }

 function setHeader(xhr) {
        xhr.setRequestHeader('Authorization', 'NLAuth nlauth_account=23984390, nlauth_email = email@email.com, nlauth_signature= myPwrd');
        xhr.setRequestHeader('Content-Type', 'application/json');
      }