function GetObj(objName) {
    if (document.getElementById) {
        return eval('document.getElementById("' + objName + '")');
    } else if (document.layers) {
        return eval("document.layers['" + objName + "']");
    } else {
        return eval('document.all.' + objName);
    }
}

function showIntro(vItemMark, vBlockMark, vCurrentIndex) {
    for (var i = 0; i < 50; i++) {/* 最多支持n个标签 */
        if (GetObj(vBlockMark + "_" + i) && GetObj(vItemMark + "_" + i)) {
            GetObj(vItemMark + "_" + i).className = "";
            GetObj(vBlockMark + "_" + i).style.display = 'none';
        }
    }
    if (GetObj(vBlockMark + "_" + vCurrentIndex) && GetObj(vItemMark + "_" + vCurrentIndex)) {
        GetObj(vItemMark + "_" + vCurrentIndex).className = "article_currentArticle";
        GetObj(vBlockMark + "_" + vCurrentIndex).style.display = 'block';
    }
}

function expandAnswer(el) {
    obj = "answerItem_" + el;
    if (document.getElementById(obj).style.display == "none") {
        document.getElementById(obj).style.display = "block";
    }
    else {
        document.getElementById(obj).style.display = "none";
    }
}