function verticalAlign( element, min_margin_top, min_margin_bottom )
{
	full_height = $(window).height();
	el_height = element.height();
	if( full_height  > el_height + min_margin_top + min_margin_bottom )
	{
		element.css( "margin-top", (full_height - el_height) * (0.2 + full_height / 5000) + "px" );
		return true;
	}
	else
	{
		element.css( "margin-top", min_margin_top + "px" );
		return false;
	}
}