Will this loading screen will affect my SEO ranking?

I use a white div covering all screen before the page loads on this site here.

I need it because the slider is positioned using javascript and it sometimes looks weird a small period of time before the javascript is applied. The site degrades - for the users that do not have javascript enabled, I use an image instead of the slider.

Will this hurt my Google Search position? It's not like I'm hiding links on purpose, and I've seen loading screens on many sites, but still, I'd like to be sure.

In case Google will penalize this implementation, are there any workarounds?

To better describe what I mean, I'll copy the css and javascript for the "white div" thing here:

CSS

.spinner_wrapper { /*THE WHITE SCREEN*/
left: 0;
top: 0;
height: 100%;
z-index: 9999;
background-color: #fff;
}
JAVASCRIPT

$(window).load(function(){


$(".spinner_wrapper").hide();

/*some other stuff for the slider*/
});

Of course, I have a noscript element, so that if the user has javascript disabled, the white screen won't block viewing the content.

<noscript>
<style>
.spinner_wrapper{
display: none;
}
</style>
</noscript>