title: Z-index doesn't work. Popup is hidden under a layer
body: <p>I am helping to maintain this website <a href="http://www.groupme.my/national/" rel="nofollow">http://www.groupme.my/national/</a></p>
  
  <p>For certain deals with a long list of options, when you click on the "Buy now" button, the options list popup will be partially covered by the deal below. For example, click on the "Buy now" button for this deal "[55% off] Korean Style Handbag...".</p>
  
  <p>Please note that not every deal comes with options. If there is no options, clicking on "Buyw now" will bring you to the shopping cart directly.</p>
  
  <p>I have tried to put in z-index, but it doesn't seem to do anything.</p>
  
  <p>Please help to check how we can resolve this problem. Thanks.</p>