function putcookie(c_name, value, expiredays) {
    //debugger
    delcookie(c_name, expiredays);
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";path=/;expires=" + exdate);
}

function delcookie(c_name) {
    //debugger
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval = getcookie(c_name);
    document.cookie = c_name + "=" + cval + ";path=/;expires=" + exp.toGMTString();
}

function getcookie(c_name) {
//debugger
    if (document.cookie.length > 0) {
        var c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            var c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) {
                c_end = document.cookie.length;
            }
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return null;
}

//window.onload = init;


//显示指定的菜单元素
function showleftmenu(submenuid) {
    //debugger
    try {
        var submenu = document.getElementById("leftsubmenu_" + submenuid);
        var mainmenu = document.getElementById("leftmainmenu_" + submenuid);
        if (submenu.style.display == "") {
            submenu.style.display = "none";
            mainmenu.className = "leftmenu";
            delcookie("exemenus");
            return;
        }
        slash_contractall();
        submenu.style.display = "";
        mainmenu.className = "leftmenuu";
        putcookie("exemenus", submenuid, 1);
    }
    catch (e) { }
}

//收缩所有菜单项
function slash_contractall() {
//debugger
    var div = document.getElementsByTagName("div");
    var submenu;
    var mainmenu;
    for (var i = 0; i < div.length; i++) {
        if (div[i].id.indexOf("leftsubmenu_") != -1) {
            div[i].style.display = "none";
            submenu = div[i].id.replace(/leftsubmenu_/, "");
            mainmenu = document.getElementById("leftmainmenu_" + submenu);
            mainmenu.className = "leftmenu";
        }
    }
    delcookie("exemenus");
}