var new_image = new Image();

function preload_main_bg(img_src)
{
	new_image.src = img_src;
	
	check_loaded(img_src);
}

function check_loaded(img_src)
{
	if(new_image.complete)
	{
		document.body.style.backgroundImage = "url('"+img_src+"')";
		document.getElementById("main_preloader_container").style.visibility = "hidden";
	}
	else
	{
		window.setTimeout("check_loaded('"+img_src+"')", 100);
	}

}