更改图像时，jQuery图像滑块将页面滚动到顶部

Question

我刚刚开始使用jQuery，所以我提前为错误的编码道歉。我只是认识到每当我向下滚动一下以便只有一点jQuery图像滑块在页面顶部可见时，它会在jQuery图像滑块更改图片时自动回滚到顶部。但是，当我在页面上尽可能地看不到滑块时，或者当我几乎没有向下滚动以便滑块的大部分仍然在屏幕上时，它不会将我滚动回到顶部。 我很感激任何帮助，因为我无法找到问题。

提前致谢。

$('#back_to_top').click(function()
	{
		$('html, body').animate({scrollTop: 0});
		return false;
	});

  // Nav bar drop down code
  $('#deals_a').hover(function(){
    $('#deals_dropdown').stop(true, true).slideDown('medium');
  });

  if(!$('#deals_dropdown').is(':hover')){
    $('#deals').mouseleave(function(){
      $('#deals_dropdown').stop(true, true).slideUp('medium');
    });
  } else {
    $('#deals_dropdown').mouseleave(function(){
      $('#deals_dropdown').stop(true, true).slideUp('medium');
    });
  };

  $('#services_a').hover(function(){
    $('#services_dropdown').stop(true, true).slideDown('medium');
  });

  if(!$('#services_dropdown').is(':hover')){
    $('#services').mouseleave(function(){
      $('#services_dropdown').stop(true, true).slideUp('medium');
    });
  } else {
    $('#services_dropdown').mouseleave(function(){
      $('#services_dropdown').stop(true, true).slideUp('medium');
    });
  };

  // Slider button code
  $('.slider_button').hover(function(){
    $('.slider_button').removeClass('active_button');
    $(this).addClass('active_button');
    $('.slide').hide();
    $($('#slider').children()[$(this).index()]).show();
  });




// Slider code
$(document).ready(function(){
  // Set options
  var speed = 500; // Fade speed
  var autoswitch_speed = 4000; // Auto slider speed

  var  myInterval = setInterval(nextSlide, autoswitch_speed);

  // Add initial active class
  $('.slide').first().addClass('active');

  // Hide all slides
  $('.slide').hide();

  // Show first slide
  $('.active').show();


  // show the first node
  ($($('#slider_button_container').children()[0])).addClass('active_button');



  var counter = 1;

  // Switch to next slide
 function nextSlide(){
   clearInterval(myInterval);
   $('.slider_button').removeClass('active_button');
   ($($('#slider_button_container').children()[counter - 1])).removeClass('active_button');
   ($($('#slider_button_container').children()[counter])).addClass('active_button');
   $('.active').removeClass('active').addClass('oldActive');
   if($('.oldActive').is(':last-child')){
     $('.slide').first().addClass('active');
     ($($('#slider_button_container').children()[3])).removeClass('active_button');
     ($($('#slider_button_container').children()[0])).addClass('active_button');
     counter = 0;
   } else {
     $('.oldActive').next().addClass('active');
   }
   $('.oldActive').removeClass('oldActive');
   $('.slide').fadeOut(speed);
   $('.active').fadeIn(speed);

   counter = (counter + 1) % 4;
   myInterval = setInterval(nextSlide, autoswitch_speed);
 }
 });

*{
  margin: 0;
  padding: 0;
}

body{
  width: 100%;
  height: 100%;
}

header{
  width: 100%;
  height: 600px;
  text-align: center;
}

#nav_menu{

  height: 98px;
  display: inline-block;
  border-bottom: 2px solid #FFF;
  padding: 0 20px 0 20px;
  position: relative;
  z-index: 2;
}

.nav_menu_items{
  float: left;
  margin: 10px;
  padding-bottom: 10px;
  width:auto;
  line-height: 80px;
}

.nav_menu_items a{
  text-decoration: none;
  color: #FFF;
  font-size: 20px;
  font-weight: bold;
  position: relative;
  font-family: 'Exo 2', sans-serif;
  font-style: italic;

}

.nav_menu_sup:hover::after{
  content: "\25B2";
  position: absolute;
  left: 40%;
  top: 14px;
}

#back_to_top, #back_to_top img{
  position: fixed;
  width: 50px;
  height: 50px;
  right: 50px;
  bottom: 50px;
  display:block;
}

.dropdown{
  display:none;
  height: auto;
  width: auto;
  font-family: 'Exo 2', sans-serif;
  font-size: 20px;
  font-weight: bold;
  font-style: italic;
  position: absolute;
  background: #FFF;
  top:100px;
  line-height: 20px;
  list-style-type: none;
}

.color_1{
  background: #4BB7BE;
}

.color_2{
  background: #2A7287;
}

.dropdown li{
padding: 10px;
;
}

.dropdown li:hover{

}

.dropdown li a{
  color: #FFF;
}

.dropdown li a:hover{
  color: #FFA;
}

#slider{
  position: relative;
  width: 100%;
  height: 100%;
  margin-top: -105px;
  z-index: 1;
  overflow: hidden;
}



.slide img{
  height: 600px;
}

.darkening_layer{
  width: 100%;
  height: 600px;
  position: absolute;
  background: rgba(0, 0, 0, 0.2);
}

#slider_button_container{
  position: relative;
  display: inline-block;
  top: -50px;
  z-index: 2;
}

.slider_button{
  height: 18px;
  width: 18px;
  border-radius: 50%;
  border: 3px solid #FFF;
  float: left;
  z-index: 100;
  margin-left: 10px;
  cursor: pointer;
  position: relative;
  display: block;
}

.slider_button:hover{
  background: #FFF;
}

.active_button{
  background: #FFF;
}

#first_slider_button{

}


#welcome{
  background: #007DCC;
  width: 100%;
  height: 400px;

}

#advertise{
  background: #004E7F;
  width: 100%;
  height: 400px;
}

footer{
  width: 100%;
  height: 400px;
  background-color: #007DCC;
}

.clear{
  clear: both;
}

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Sea Kozmetik ve Güzellik</title>
    <link rel="stylesheet" style="text/css" href="css/style.css">
    <link href="https://fonts.googleapis.com/css?family=Bitter|Exo+2" rel="stylesheet">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
  </head>
  <body>
    <div id="container">
      <header>
        <div id="nav_menu">
          <div id="home" class="nav_menu_items">
            <a class="nav_menu_sup" href="#">ANASAYFA</a>
          </div>
          <div id="about" class="nav_menu_items">
            <a class="nav_menu_sup" href="#">HAKKIMIZDA</a>
          </div>
          <div id="deals" class="nav_menu_items">
            <a class="nav_menu_sup" id="deals_a" href="#">KAMPANYALAR</a>
            <ul id="deals_dropdown" class="dropdown">
              <li class="color_1"><a href="#">Öğrenci Kampanyaları</a></li>
              <li class="color_2"><a href="#">Epilasyon Kampanyaları</a></li>
              <li class="color_1"><a href="#">Cilt Bakımı Kampanyaları</a></li>
            </ul>
          </div>
          <div id="services" class="nav_menu_items">
            <a class="nav_menu_sup" id="services_a" href="#">HİZMETLERİMİZ</a>
            <ul id="services_dropdown" class="dropdown">
              <li class="color_1"><a href="#">Cilt Bakımı</a></li>
              <li class="color_2"><a href="#">Depilasyon</a></li>
              <li class="color_1"><a href="#">Epilasyon</a></li>
              <li class="color_2"><a href="#">Manikür</a></li>
              <li class="color_1"><a href="#">Pedikür</a></li>
              <li class="color_2"><a href="#">Tırnak Bakımı</a></li>
              <li class="color_1"><a href="#">Kaş Tasarımı</a></li>
              <li class="color_2"><a href="#">Makyaj</a></li>
            </ul>
          </div>
          <div id="products" class="nav_menu_items">
            <a class="nav_menu_sup" href="#">ÜRÜNLERİMİZ</a>
          </div>
          <div id="gallery" class="nav_menu_items">
            <a class="nav_menu_sup" href="#">GALERİ</a>
          </div>
          <div id="contact" class="nav_menu_items">
            <a class="nav_menu_sup" href="#">İLETİŞİM</a>
          </div>
        </div>
        <!-- Picture size must be 1519px x 600px -->
        <div id="slider">
          <div id="first_slide" class="slide">
            <div class="darkening_layer"></div>
            <img src="images/slide_7.jpg" alt="">
          </div>

          <div id="second_slide" class="slide">
            <div class="darkening_layer"></div>
            <img src="images/slide_8.jpg" alt="">
          </div>

          <div id="third_slide" class="slide">
            <div class="darkening_layer"></div>
            <img src="images/slide_9.jpg" alt="">
          </div>

          <div id="fourth_slide" class="slide">
            <div class="darkening_layer"></div>
            <img src="images/slide_10.jpg" alt="">
          </div>

        </div>
        <div id="slider_button_container">
          <div id="first_slider_button" class="slider_button"></div>
          <div id="second_slider_button" class="slider_button"></div>
          <div id="third_slider_button" class="slider_button"></div>
          <div id="fourth_slider_button" class="slider_button"></div>
          <div class="clear"></div>
        </div>
      </header>
      <div id="back_to_top">
        <a href="#"><img src="images/arrow_up.png" alt="back to top"></a>
      </div>
      <section id="welcome">

      </section>
      <section id="advertise">

      </section>
      <footer>

      </footer>
    </div>
    <script src="js/script.js"></script>
  </body>
</html>