var http_request = false;

// 创建 XMLHttpRequest 请求
function CommentMakeRequest(url, functionName, httpType, sendData) {
    http_request = false;
    if (!httpType) httpType = "GET";

    if (window.XMLHttpRequest) {
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/plain');
        }
    } else if (window.ActiveXObject) {
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }

    if (!http_request) {
        alert('Cannot send an XMLHTTP request');
        return false;
    }

    var changefunc = "http_request.onreadystatechange = " + functionName;
    eval(changefunc);

    http_request.open(httpType, url, true);
    http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    http_request.send(sendData);
}

// 提交分页请求
function CommentToPage(page) {
    CommentMakeRequest(
        "/skin/ecms8/infocomment/?classid=7&id=3&doaction=&page=" + page + "&t=" + Math.random(),
        'CommentReturnedText',
        'GET',
        ''
    );
}

// 请求返回后的处理函数
function CommentReturnedText() {
    if (http_request.readyState === 4) {
        if (http_request.status === 200) {
            var messagereturn = http_request.responseText;
            if (messagereturn !== 'isfail') {
                var r = messagereturn.split('<!--empirecms.infocomment-->');
                if (r.length !== 1) {
                    if (r[0] !== '') {
                        document.getElementById('infocommentnumarea').innerHTML = r[0];
                    }
                    document.getElementById('infocommentarea').innerHTML = r[1];
                } else {
                    document.getElementById('infocommentarea').innerHTML = messagereturn;
                }
            }
        } else {
            alert('There was a problem with the request.');
        }
    }
}

// 初始加载第一页
CommentToPage(0);