內容定位導航js（移動端)

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var myexports={};myexports.init = function(){    myexports.moreTxt();//調用}myexports.moreTxt = function(){var subject =$(‘#j_subject‘);    var navigation = $(‘#j_nav‘);           //導航    var nav = subject.find(‘.nav-list‘);    //所有按鈕    var conBox = subject.find(‘.cont-box‘);   //模組    var navTop = navigation.offset().top;  //導航相對於瀏覽器視口到高度    nav.on(_tap,function(){        var t = $(this);        var ts = t.siblings(‘li‘);        t.addClass(‘on‘);        ts.removeClass(‘on‘);        var tindex = t.index();        var section = conBox.eq(tindex);        var stop = section.offset().top;        $(‘body,html‘).scrollTop(stop);    });    $(window).scroll(function () {        $(‘.cont-box‘).each(function(a,b) {            var w = $(window).scrollTop();            var ctop = $(this).offset().top;            if (w>ctop-30) {                navigation.find(‘li‘).removeClass(‘on‘);                navigation.find(‘li‘).eq(a).addClass(‘on‘);            }        });    }).trigger("scroll");}$(function() {    myexports.init();});

 

內容定位導航js（移動端)