first visible sibling

first visible sibling

Hello, 
I have an unordered list where the items can be visible or not and now I need to know which is the first visible item.
For instance if my list is

  1. <ul id="myList">
  2.       <li>first item</li>
  3.       <li>second item</li>
  4.       <li>third item</li>
  5.       <li>fourth item</li>
  6.       <li>fifth item</li>
  7. </ul>
and in the screen it looks like:

  • third item
  • fifth item

What I need is 3.

I tried some selectors but I can't get what I need, 
Anyone can help me out with this?


Thanks and have a nice weekend?