//动态设置侧边栏滚动
 $(function () {
    var offset_top = $('.right_nav').offset().top; //获取右侧导航距离顶部的高度
    var begin = 0,
       end = 0,
       timer = null;
    $('.right_nav li:last').hide(); //先将回到顶部隐藏

    $(window).scroll(function (evt) {
       clearinterval(timer);
       var scroll_top = $(window).scrolltop();
       end = offset_top + scroll_top;
       scroll_top > 100 ? $('.right_nav li:last').fadein() : $('.right_nav li:last').fadeout(); //滚动距离判断是否显示回到顶部

       timer = setinterval(function () { //滚动定时器
          begin = begin + (end - begin) * 0.2;
          if (math.round(begin) === end) {
             clearinterval(timer);
          }
       }, 10);
    });
 });

 //右侧导航伸缩效果
 var right_nav = $(".right_nav");
 var temps;
 $(".right_nav").hover(function () {
       var thisobj = $(this);
       temps = settimeout(function () {
          thisobj.find("li").each(function (i) {
             var ta = $(this);
             settimeout(function () {
                ta.animate({
                   right: "0"
                }, 200);
             }, 50 * i);
          });
       }, 200);
    },
    function () {
       if (temps) {
          cleartimeout(temps);
       }
       $(this).find("li").each(function (i) {
          var ta = $(this);
          settimeout(function () {
             ta.animate({
                right: "-70"
             }, 200, function () {});
          }, 50 * i);
       });
    });

 //右侧导航点击事件
 $(".right_nav li").each(function (i) {
    if (i == 0 || i == 1 || i == 2) {
       $(this).mouseover(function () {
          $(this).children(".hidebox").stop().fadein();
          right_nav.css('overflow', 'visible')
       });
       $(this).mouseout(function () {
          $(this).children(".hidebox").hide();
          right_nav.css('overflow', 'hidden')
       });
    } else if (i == 3) {
       $(this).click(function () {
           location.href = 'lxwm.aspx?channel_id=15';
       })
    } else if (i == 4) {
       $(this).click(function () {
          $('body,html').animate({
             scrolltop: 0
          }, 400);
       })
    }
 })