function tabit(btn, num) {

    var idname = new String(btn.id);

    var s = idname.indexOf("_");

    var e = idname.lastIndexOf("_") + 1;


    var tabName = idname.substr(0, s);

    var id = parseInt(idname.substr(e, 2));

    for (i = 0; i < num; i++) {

        document.getElementById(tabName + "_div_" + i).style.display = "none";

        document.getElementById(tabName + "_btn_" + i).className = "normal";

    };

    document.getElementById(tabName + "_div_" + id).style.display = "block";

    btn.className = "active";

}

function cengdieMenu(btn, num) {

    var idname = new String(btn.id);

    var s = idname.indexOf("_");

    var e = idname.lastIndexOf("_") + 1;


    var tabName = idname.substr(0, s);

    var id = parseInt(idname.substr(e, 2));

    for (i = 0; i < num; i++) {

        document.getElementById(tabName + "_ul_" + i).style.display = "none";

    };

    document.getElementById(tabName + "_ul_" + id).style.display = "block";

}

function setCookie(name, value, expires) {
    var exp = new Date();
    exp.setTime(exp.getTime() + expires * 60 * 60 * 1000);
    document.cookie = name + "=" + escape(value) +
          ";   expires=" + exp.toGMTString() + ";   path=/";
}

function getCookie(name) {

    var search;

    search = name + "="
    offset = document.cookie.indexOf(search)
    if (offset != -1) {
        offset += search.length;
        end = document.cookie.indexOf(";", offset);
        if (end == -1)
            end = document.cookie.length;
        return unescape(document.cookie.substring(offset, end));
    }
    else
        return "";
}

function deleteCookie(name) {

    var expdate = new Date();
    expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));
    setCookie(name, "", expdate);
}