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<style>
.top_scroll_btn{display: none;transition: 0.3s;}
.top_scroll_btn.on{display: block;}
.top_scroll_btn:hover img{margin-left: -60px;}
</style>
<div class="footer_margin" style="margin-top: 130px;"></div>
<div class="top_scroll_btn_div" style="position: fixed;right: 240px;bottom: 60px;">
<div class="top_scroll_btn" style="width: 60px;height: 60px;overflow: hidden;cursor: pointer;"><img src="../img/web_manual/up_scroll.png"></div>
</div>
<script>
$(function(){
$(window).scroll(function(){
if($(this).scrollTop() > 80){
$('.top_scroll_btn').addClass('on');
} else {
$('.top_scroll_btn').removeClass('on');
}
});
$('.top_scroll_btn_div').click(function(){
window.scrollTo({top: 0, behavior: 'smooth'});
});
});
</script>
<body>
</html>
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