jQuery窗口滚动事件? [英] JQuery window scrolling event?

问题描述

我的标题中有一个广告，页面底部始终有一个固定的广告.我希望仅当用户在标题广告下滚动时才显示固定广告.我查看了JQuery文档，但不确定如何使用.

I have an ad in my header and a fixed ad at the bottom of my page that is always there. I want the fixed ad to appear only if the user has scrolled under the header ad. I looked into the JQuery documentation, but I'm not really sure what I should use.

推荐答案

请尝试以下操作: http://jsbin.com/axaler/3/修改

$(function(){
  $(window).scroll(function(){
    var aTop = $('.ad').height();
    if($(this).scrollTop()>=aTop){
        alert('header just passed.');
        // instead of alert you can use to show your ad
        // something like $('#footAd').slideup();
    }
  });
});

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