边栏 滚动

 <script>
 $(function(){
var _go = [0,1017,1556,2205,3090,3968,$(document).height()];
        var $jumpbar = $("#jumpbar"),
            $window = $(window),
            offset = $jumpbar.offset(),
            topPadding = 100,
            jL = $("#jumpbar a").length;
            $(window).scroll(
                    function()
                    {
                        if($window.scrollTop() > offset.top)
                        {
                            $jumpbar.stop(true,true).animate(
                                    {
                                        top:$window.scrollTop()-offset.top + topPadding
                                    },500
                            );
                        }
                        else
                        {
                            $jumpbar.stop(true,true).animate(
                                    {
                                        top:0
                                    }
                            )
                        }
                    }
            )
        
            for(var i = 0; i <jL;i++)
            {
                $("#jumpbar a:nth-child("+(i+1)+")").click(function(i){return function(){$("html,body").stop(true,true).animate({scrollTop:_go[i]},500);}}(i));
            }
            


        
                        
});
</script>

 

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