设置滚动位置

//返回顶部
$('.leftTop').click(function(){
     $('body,html').animate({scrollTop:0},500);
 });

到指定位置
html:

<!-- left 导航-->
<div class="nav-left">
    <ul class="floatCtro">
        <li data-key="daPeiTaoZhuang">
            <a href="javascript:;">搭配套装</a>
            <span></span>
        </li>
        <li data-key="woshi">
            <a href="javascript:;">卧室</a>
            <span></span>
        </li>
        <li data-key="keting">
            <a href="javascript:;">客厅</a>
            <span></span>
        </li>
        <li data-key="goon">
            <a href="javascript:;">还没逛够</a>
            <span></span>
        </li>
        <span class="leftTop"><i class="tops"></i>顶部</span>
    </ul>
</div>

<div class="main-box" >
                    </a>
                </div>
            </li>
        </ul>
    </div>
</div>

js:

$('.floatCtro li').click(function(){
     var id = $(this).attr("data-key");
     var topVal = $('#'+id).offset().top-50;
     $('body,html').animate({scrollTop:topVal},500);
 });