$(function(){ var thisBox = $('.lanren'); var defaultTop = thisBox.offset().top; var slide_min = $('.lanren .slide_min'); var slide_box = $('.lanren .slide_box'); var closed = $('.lanren .slide_box h2 img'); slide_min.on('click',function(){$(this).hide(); slide_box.show();}); closed.on('click',function(){slide_box.hide().hide();slide_min.show();}); // 页面滚动的同时，悬浮框也跟着滚动 $(window).on('scroll',function(){scro();}); $(window).onload = scro(); function scro(){ var offsetTop = defaultTop + $(window).scrollTop()+'px'; thisBox.animate({top:offsetTop}, { duration: 600, //滑动速度 queue: false //此动画将不进入动画队列 }); } });