var req;
var context;
var contextPath;
var formID;
var subject_seq;
//初始化
function createXMLHttpRequest() {
    if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
    }
    else if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    }
}

function checkArticleExists(tempurl, article_seq, contextpath, formId, subjectId) {
    contextPath = contextpath;
    context = article_seq;
    formID = formId;
    subject_seq = subjectId;
    createXMLHttpRequest();
    req.onreadystatechange = processResponse;
    req.open("POST", tempurl, false);
    req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    req.send(null);
}

function processResponse() {
    if (req.readyState == 4) { // 判断对象状态
        if (req.status == 200) { // 信息已经成功返回，开始处理信息
            setMessage();
        } else { //页面不正常
            window.alert("页面异常");
        }
    }
}

function setMessage() {
    var result = req.responseText;
    if (result == 0) {
        alert("此信息没有链接!")
    } else {
        document.getElementById(formID).action = contextPath + "/page/jsp/article/articleDetails.do?subject_seq=" + subject_seq + "&article_seq=" + context;
        document.getElementById(formID).target = "_blank";
        document.getElementById(formID).submit();
    }
}