var $view            = $('html,body'),$backTop      = $('#backTop'),

$backTop.on('click',function(){

            $view.animate({

                'scrollTop':0

            },200);

        });

   $("#id").animate({scrollTop:0},200)

    <div class="moreRomm" style="background-color:#4990e2;"><a href="javascript:void(0)" onclick="$('#company_Tree').animate({scrollTop:0},200);"><span>返回页面顶部</span></a></div>

$('html, body').animate({scrollTop:0}, 'slow');