undefined href属性值javascript

Question

我想要href值，但是这给了我未定义的，为什么呢？

var hy = $('.Player a.sc-player').attr('href');

console.log(hy);

<div id="Container">
  <header>
    <div id="Player">
      <div class="Player">
        <a href="https://soundcloud.com/rapzilla/andy-mineo-stop-the-traffic" class="sc-player"></a>
        <p>hellow</p>
        <a href="" class="download_song">Download</a>
      </div>
    </div>
    <!--/Player-->
  </header>**strong text**

Answer 1

$（document）.ready（function（）{

    alert($('.Player a.sc-player').attr('href'))
});