Actually, this is an old trick..... But, it's good for overlay! You can put any add-ons on it. Ok, let's start.
1. Open your NotePad and type this code:
<">Note: Change the "Your_Loading_Page.html" into your own loading page location....
2. Upload that file to your hosting location, example: ripway, 110mb, etc...
3.Then, just use the js linker. (I've posted it before!).....
Additional CSS code (optional) Loading Page!
<">You can change the page background into your own loading pic.
I suggest you to use the css code above.

Good For All Browser!