前端锚点链接平滑滚动效果

        targetOffset=$(target).offset().top; 获取该锚点到浏览器顶部的距离，然后给body添加动画

        $('html,body').animate({

        scrollTop: targetOffset

        },

        1000);

    $('a[href*=#],area[href*=#]').click(function() {

    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;

    }

    }

    });