按类获取单击元素的索引

I have some HTML like this:

我有一些像这样的HTML:

<div class="slide">
  <a href="/go.html?url=#" class="test">Test</a>
</div>
<div class="other">
  ...
</div>
<div class="slide">
  <a href="/go.html?url=#" class="test">Test</a>
</div>
<div class="other">
  ...
</div>
<