$(function () {
            $("li.menu_yj div a").css({ "color": "#666" });           
            $("li.menu_yj").hover(
                function () {
                    $(this).find("div:first").slideDown();
                    $('li.menu_yj').removeClass("bnt");
                    $(this).addClass("bnt");
                },
                function () {
                    $(this).find("div:first").slideUp();
                });
            $("li.menu_yj ul li").hover(
                function () {
                    $(this).find("div:first").slideDown();
                    $(this).find("a:first").css({ "font-size": "13px" });
                    $(this).find("a:first").css({ "color": "#044d95" })
                },
                function () {
                    $(this).find("div:first").slideUp(); $(this).css({ "backgroundColor": "" });
                    $(this).find("a").css({ "color": "#666" })
                    $(this).find("a:first").css({ "font-size": "12px" });
                });

            $("li.second_menu").hover(
                function () {
                    $(this).find("div:first").show();
                   
                },
                function () {
                    $(this).find("div:first").hide();                   
                    
                });
        })
        function changeBg(tag, num, dv) {
            var t1 = document.getElementById(tag + "1");
            var t2 = document.getElementById(tag + "2");
            if (num == 1) {
                t1.className = "Btext1 Bcor1";
                t2.className = "Btext2 Bcor2";
                t1.parentNode.className = "Ctitle bnt1";
                document.getElementById(dv + "1").style.display = "block";
                document.getElementById(dv + "2").style.display = "none";
            }
            else {
                t1.className = "Btext1 Bcor2";
                t2.className = "Btext2 Bcor1";
                t1.parentNode.className = "Ctitle bnt2";
                document.getElementById(dv + "1").style.display = "none";
                document.getElementById(dv + "2").style.display = "block";
            }
        }