function topicDispgetElement(id) { 
     var element = null;
     try {
          element = document.getElementById(id);
     }
     catch (e) {
         element = document.all[id];
     }
     return element;
}

function topicDisp_init() {
    var artObj = topicDispgetElement("artFold");
    if (artObj) {
        artObj.style.display = "none";
    }
    var linkObj = topicDispgetElement("foldLink");
    if (linkObj) {
        var linkHtml = '<a href="#" onClick="topicDisp_change(' + "'op'" + ');return false" Class="topics_foldLink">[一覧]</a>';
        linkObj.innerHTML = linkHtml;
    }
}

function topicDisp_change(state) {
    var artObj = topicDispgetElement("artFold");
    if (artObj) {
        if (state == 'op') {
            artObj.style.display = "block";
        } else if (state == 'cl') {
            artObj.style.display = "none";
        }
    }

    var linkObj = topicDispgetElement("foldLink");
    if (linkObj) {
        var linkHtml = '';
        if (state == 'op') {
            linkHtml = '<a href="#" onClick="topicDisp_change(' + "'cl'" + ');return false" Class="topics_foldLink">[閉じる]</a>';
        } else if (state == 'cl') {
            linkHtml = '<a href="#" onClick="topicDisp_change(' + "'op'" + ');return false" Class="topics_foldLink">[一覧]</a>';
        }
        linkObj.innerHTML = linkHtml;
    }
}