点击页面锚点的时候

$(function(){
          $('a[href*=#],area[href*=#]').click(function() {
              if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {
                  var pagehash = this.hash;
                console.log(pagehash)
                            $(".second_category_60").removeClass("on");
                            $(".second_category_58").removeClass("on");
                            $(".second_category_59").removeClass("on");
                            $(".second_category_15").removeClass("on");
    
                  if(pagehash=="#miao21"){
                      $(".second_category_60").addClass("on");
                  }
                  if(pagehash=="#miao11"){
                      $(".second_category_58").addClass("on");
                  }
                  if(pagehash=="#miao31"){
                      $(".second_category_59").addClass("on");
                  }
                   if(pagehash=="#miao41"){
                       $(".second_category_15").addClass("on");
                  }
              var $target = $(this.hash);
              $target = $target.length && $target || $('[name=' + this.hash.slice(1) + ']');
              if ($target.length) {
                var targetOffset = $target.offset().top-100;
                $('html,body').animate({
                  scrollTop: targetOffset
                },
                600);
                return false;
              }
            }
          });
        });

进入页面的时候

var myHash2 = location.hash;
if(myHash2=="#miao11"){
    $('body,html').animate({scrollTop:$(myHash2).offset().top-100},1000);
}
if(myHash2=="#miao21"){
    $('body,html').animate({scrollTop:$(myHash2).offset().top-100},1000);
}
if(myHash2=="#miao31"){
    $('body,html').animate({scrollTop:$(myHash2).offset().top-100},1000);
}
if(myHash2=="#miao41"){
    $('body,html').animate({scrollTop:$(myHash2).offset().top-100},1000);
}