5
This happens when you try to load some HTTP content within an HTTPS page, such as Javascript:
             ERRADO
               ↓
<script src="http://ajax.googleapis..."></script>
              CORRETO
                 ↓
<script src="https://ajax.googleapis..."></script>
          CORRETO (veja nota)
             ↓
<script src="//ajax.googleapis..."></script>
Note: Without specifying the protocol only works when the remote URL accepts both HTTP and HTTPS protocols.

What scripts are these?
– Sam
are fadein() and fadeOut() scripts of Divs and another of "search of matched cities", with mysql
– Joao Pedro
Take a look at the answer and run a test, please. :)
– Sam