How to define a navigation bar menu using js and JQuery

<p class="Maintenance">
        <p class="Title">
            <p class="M_Button" id="Plan">menu1</p>
            <p class="M_Button" id="Expert">menu2</p>
            <p class="M_Button" id="Team">menu3</p>
            <p class="M_Button" id="Medic">menu4</p>
            <p class="M_Button" id="Shelter">menu5</p>
            <p class="M_Button" id="Warehouse">menu6</p>
        </p>
    </p>
    <!-- menu1 -->
    <p class="Content" id="coPlan">111
    </p>
    <!-- menu2 -->
    <p class="Content" id="coExpert" style="display: none">222
    </p>
    <!-- menu3 -->
    <p class="Content" id="coTeam" style="display: none">333
    </p>
    <!-- menu4-->
     <p class="Content" id="coMedic" style="display: none">444
    </p>
    <!--menu5-->
    <p class="Content" id="coShelter" style="display: none">
              </p>
    </p>
    <!-- menu6 -->
    <p class="Content" id="coWarehouse" style="display: none">666
    </p>

$(".M_Button").click(function () {
        $(".M_Button").removeClass("M_Button_inner");
        $(this).addClass("M_Button_inner");
        $(".Content").hide();
        TabButton = $(this).attr('id');
        $('#co' + TabButton).css('display', 'block');
    });

.M_Button {
    float: left;
    height: 42px;
    width: 98px;
    cursor: pointer;
    line-height: 42px;
    color: #FFFFFF;
    text-align: center;
    font-size: 14px;
    background-image: url(../../images/emergency/ReffectRadius/The_pop-up_1.png);
    background-repeat: no-repeat;
    background-position: right;
}

    .M_Button:hover {
        color: #000;
        background-image: url(../../images/emergency/ReffectRadius/The_pop-up_2.png);
        background-repeat: repeat-x;
    }.M_Button_inner {
    color: #000;
    background-image: url(../../images/emergency/ReffectRadius/The_pop-up_2.png);
    background-repeat: repeat-x;
}.Content {
    float: left;
    height: 438px;
    width: 100%;    /*background-image: url(../../../../images/Inspection/Hidden_danger/background.png);*/}.M_Content {
    height: 434px;
    width: 100%;
    z-index: 5;
    position: absolute;    /*background-color: #666;*/
    right: 2px;
    top: 0px;
}