CSS实现：http://stackoverflow.com/questions/17631417/css-pure-css-scroll-animation

jq实现：

$(function () {    $('a[href*=#],area[href*=#]').click(function () {        console.log(this.pathname)        if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {            var $target = $(this.hash);            $target = $target.length && $target || $('[name=' + this.hash.slice(1) + ']');            if ($target.length) {                var targetOffset = $target.offset().top;                $('html,body').animate({                    scrollTop: targetOffset                },                        1000);                return false;            }        }    });});