<script src="../js/jquery-2.1.0.js"></script>
?? ?<script type="text/css">
?? ??? ?$(docment).ready(function(){
?? ??? ??? ?$(window).scroll(function(){
?? ??? ??? ??? ?var top = $(document).scrollTop();
?? ??? ??? ??? ?var menu = $("#menu");
?? ??? ??? ??? ?var items = $("#content").find(".item");
?? ??? ??? ??? ?var currentId="";?? //給樓層設置id
?? ??? ??? ??? ?
?? ??? ??? ??? ?items.each(function(){
?? ??? ??? ??? ??? ?var t= $(this);
?? ??? ??? ??? ??? ?var itemtop = t.offset().top;
?? ??? ??? ??? ??? ?if(top > itemtop){
?? ??? ??? ??? ??? ??? ?currentId = "#"+ t.attr("id");? //給相印的樓層a設置current,取消其他相關的current
?? ??? ??? ??? ??? ?}else{
?? ??? ??? ??? ??? ??? ?return false;
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?});
?? ??? ??? ??? ?console.log(top);
?? ??? ??? ?});
?? ??? ?});