(function(){

    var myhost = "www.smaryun.com";

    var params = params || {};

    //Document对象数据
    if(document) {
        params.domain = document.domain || '';
        params.url = document.URL || '';
        params.title = document.title || '';
        params.referrer = document.referrer || '';
    }

    //Window对象数据
    if(window && window.screen) {
        params.sh = window.screen.height || 0;
        params.sw = window.screen.width || 0;
        params.cd = window.screen.colorDepth || 0;
    }

    //navigator对象数据
    if(navigator) {
        params.lang = navigator.language || '';
    }

    //拼接参数串
    var args = '';

    for(var i in params) {

        if(args != '') {
            args += '&';
        }
        args += i + '=' + encodeURIComponent(params[i]);
    }

    var strCookie = document.cookie;
    var arrCookie = strCookie.split("; ");
    for(var i = 0; i < arrCookie.length; i++){
        var arr = arrCookie[i].split("=");

            switch(arr[0]){
                case 'g_user_id':
                    args += '&uc_id=' + arr[1];
                    break;
                case 'gs_username':
                    args += '&uc_name=' + arr[1];
                    break;

                default:
                    break;
            }
    }

    //通过Image对象请求后端脚本
    var img = new Image(1, 1);
    img.src = "http://" + myhost + '/ucenter/user.php?a=analyse&' + args;
})();