javascript - Skrollr not animating without browser refresh -

javascript - Skrollr not animating without browser refresh -

i've been playing around skrollr demo animation on #slide-1 doesn't work unless refresh page first:

<section id="slide-1" class="homeslide"> <div class="bcg" data-center="background-position: 50% 0px;" data-top-bottom="background-position: 50% -200px;" data-anchor-target="#slide-1"> <div class="hscontainer"> <div class="hscontent"> <h2>scroll down...</h2> </div> </div> </div> </section>

here link page. doing wrong?

initialize skrollr when preloader done, or phone call refresh then.

javascript jquery html5 parallax skrollr