$(function () {
    //导航菜单控制
    var active_buttom_b;
    $(".Nav_button_gray").mouseover(function () {
        if (active_buttom_b) active_buttom_b.slideUp("fast");
        var b_name = "#" + $(this).attr("id") + "_b";
        active_buttom_b = $(b_name);
        active_buttom_b.slideDown("fast");
    });

    $(".Nav_button_b").mouseleave(function () {
        $(this).slideUp("fast");
    });

    //导航样式控制
    var current_url = document.location;
    var nav_first = $("#Nav_button_1");
    if (current_url != "http://www.kzrcw.com/") {
        nav_first.removeClass("Nav_button_red").addClass("Nav_button_gray2").text("返回首页").attr("href","http://www.kzrcw.com");
    }
});