//转换左侧产品列表的展开及收缩状态。
    function chgSubMenu(cid) {
        var item = document.getElementById(cid);

        if (item == null || item == undefined) {
            return;
        }

        //alert("item.display=" + item.style.display);
        if (item.style.display == "none") {
            item.style.display = "block";
            var LCM_showId = item.parentNode.id;
            SetCookie("LCM_showId", cid);
            //alert("展开本id:" + cid);
        }
        else {
            item.style.display = "none";
            var LCM_showId = item.parentNode.id;
            SetCookie("LCM_showId", LCM_showId);
            //alert("展开父id:" + LCM_showId);
        }
    }

    var obj = document.getElementById("LCM_LeftMenu").getElementsByTagName("DIV");
    //    alert(obj);
    //    alert(obj.length);
    for (var i = 0; i < obj.length; i++) {

        //obj[i].style.display = "none";
        var subMenu = obj[i].getElementsByTagName("DIV");
        for (var j = 0; j < subMenu.length; j++) {
            subMenu[j].style.display = "none";
        }
    }

    var showMenuId = GetCookie("LCM_showId");
    var showMenu = document.getElementById(showMenuId);
    while (showMenu != null) {
        if (showMenu.style != null) {
            showMenu.style.display = "block";
        }
        if (showMenu.parentNode != null && showMenu.parentNode.id != "LCM_LeftMenu") {
            showMenu = showMenu.parentNode;
        }
        else {
            break;
        }
    }