jQuery代码简单实现网页返回顶部特效功能

<script>
    $(document).ready(function (){
        $("#click").click(function (){
            $('html, body').animate({
                scrollTop: $("#div1").offset().top
            }, 100);
        });
    });
</script>

<div id="div1" style="height: 1000px; width 100px">
    Test
</div>
<br/>
<div id="div2" style="height: 1000px; width 100px">
    Test 2
</div>
<button id="click">Click me</button>