ajax basic 认证

 //需要Base64见：http://www.webtoolkit.info/javascript-base64.html
        function make_base_auth(user, password) {
            var tok = user + ':' + password;
            var hash = Base64.encode(tok);
            return "Basic " + hash;
        }
        var auth = make_base_auth('user', 'pwd');
        // 原始JavaScript
        //xml = new XMLHttpRequest();
        //xml.setRequestHeader('Authorization', auth);
        //xml.open('GET', url)
        // jQuery
        $.ajax({
            url: "http://xxx.com",
            method: 'GET',
            beforeSend: function (req) {
                req.setRequestHeader('Authorization', auth);
            },
            success: function (msg) {
                //构造echarts

            }
        });