$(function() {
	// make the site vertically centered
	var site_container_height= $('#site_container').height();
	if ($(window).height() > site_container_height) {
		$('#distance').css({
			height: 		'50%',
			marginBottom: 	'-' + site_container_height / 2 + 'px'
			});
		$('#site_container').css('height', site_container_height+'px');
	}	
})