$(function() {

    /*
    //初始化菜单打开项
    var keyTag = "mItem";
    var keyVal = getUrlArg(keyTag, window.location.href);
    if (window.location.href.indexOf(keyTag) > -1 && parseInt(keyVal)) {
    initMenuItem(keyVal);
    } else {
    initMenuItem();
    }

    function initMenuItem(v) {
    var showItem = 0;
    if (v) {
    showItem = v - 1;
    }
    var $m = $('.b2:eq(' + showItem + ')');
    $m.slideDown();
    $('.b2', $mWrap).not($m).slideUp();


    function getUrlArg(argkey, url) {
        var argstr = argkey + "=";
        var startPos = "";
        var endPos = "";

        var url = (url) ? url : window.location.href;
        if (url.indexOf(argstr) > -1) {
            startPos = url.indexOf(argstr) + argstr.length;
        }
        var tempstr = url.substr(startPos);
        if (tempstr.indexOf("&") > -1) {
            endPost = tempstr.indexOf("&");
            tempstr = tempstr.substr(tempstr, endPost);
            return tempstr;
        } else if (tempstr.indexOf("#") > -1) {
            endPost = tempstr.indexOf("#");
            tempstr = tempstr.substr(tempstr, endPost);
            return tempstr;
        } else {
            return tempstr
        }
        return "";

    }


    }*/

    var $mWrap = $("#sidebar");

    $('.a1', $mWrap).click(function(e) {
        var $m = $('.b2', this.parentNode);
        $m.slideDown();
        $('.b2', $mWrap).not($m).slideUp();
        e.preventDefault();
        e.stopPropagation();
    })



    })