锚点跳转滑动效果

1、jquery的简易方法

$('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;
        }
    }
});

2、原生javascript的简易方法

//取得a标签href里有#的属性
var a=document.getElementsByTagName("a");
var arr=[];
for(var i=0;i< a.length;i++){
    if(a[i].href.indexOf("#")!=-1){
        arr.push(a[i]);
    }
}

//如果移动就停止滚动的方法
var bool=false;
var body=document.getElementsByTagName("body")[0];
body.addEventListener("mousewheel",function(){
    bool=true;
});
//火狐的停止滚动
body.addEventListener("DOMMouseScroll",function(){
    bool=true;
});
//为a标签href里有#的标签绑定事件
for(var i=0;i<arr.length;i++){
    arr[i].onclick=function(){
        bool=false;
        if (location.pathname.replace(/^//, '') == this.pathname.replace(/^//, '') && location.hostname == this.hostname) {
            var target=document.getElementsByName(this.hash.slice(1))[0];
            var body=document.getElementsByTagName("body")[0];
            if(target.offsetTop<body.scrollTop){
                var timer=setInterval(function(){
                    var up_top=body.scrollTop;
                    body.scrollTop-=20;
                    if(body.scrollTop<=target.offsetTop||body.scrollTop==up_top||bool){
                        clearInterval(timer);
                    }
                },1);
            }else{
                var timer=setInterval(function(){
                    var up_top=body.scrollTop;
                    body.scrollTop+=20;
                    if(body.scrollTop>=target.offsetTop||body.scrollTop==up_top||bool){
                        clearInterval(timer);
                    }
                },1);
            }
            return false;
        }
    };
}