How to make fancybox to load content when the page loads?

The question is worded crooked, Yes.
There are vsplyvala on fancybox (div style="display:none;"), it put the iframe with the form of payment of andextend.
Problem: payment form starts to load only after a call to fancybox, visually at first an empty window, after 2-3sec load form.
how to make ifarme of andextend be loaded immediately when the page loads?