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jQuery实现固定顶部 定位滚动导航效果代码，很常见的效果，非常实用；滚动滚动条时，导航固定顶部，并且滚动到对应的板块时，当前导航高亮显示；点击导航文字时平滑跳转到对应的板块。
$(function(){ var subNav_active = $(".adv_active"); var subNav_scroll = function(target){ subNav_active.removeClass ("adv_active"); target.parent().addClass("adv_active"); subNav_active = target.parent(); }; $("#subNav a").click(function(){ subNav_scroll($(this)); var target = $(this).attr("href"); var targetScroll = $(target).offset().top - 80; $("html,body").animate({scrollTop:targetScroll},300); return false; }); //页面跳转时定位 if(window.location.hash){ var targetScroll = $(window.location.hash).offset().top - 80; $("html,body").animate({scrollTop:targetScroll},300); } $(window).scroll(function(){ var $this = $(this); var targetTop = $(this).scrollTop(); var footerTop = $("#footer").offset().top; var height = $(window).height(); if (targetTop >= 520){ $("#subNav").addClass("fixedSubNav"); $(".empty-placeholder").removeClass("hidden"); }else{ $("#subNav").removeClass("fixedSubNav"); $(".empty-placeholder").addClass("hidden"); } if(targetTop < 750){ subNav_scroll($(".adv_door")); }else if(targetTop > 1200 && targetTop < 1640){ subNav_scroll($(".adv_source")); }else if(targetTop > 2314 && targetTop < 2734){ subNav_scroll($(".adv_price")); }else if(targetTop > 2968 && targetTop < 3268){ subNav_scroll($(".adv_transfer")); }else if(targetTop > 3327 && targetTop < 3627){ subNav_scroll($(".adv_payment")); }else if(targetTop > 3651 && targetTop < 4071){ subNav_scroll($(".adv_promise")); }else if(targetTop > 4163 && targetTop < 4473){ subNav_scroll($(".adv_ride")); }else if(targetTop > 4580){ subNav_scroll($(".adv_finance")); } }) 标签：
原文地址：http://blog.csdn.net/zyu67/article/details/43274111
