/*
$(document).ready(function() {
	//vertically center the container
	var container_height = 360;
	
	center_container('#background_grid'); 
	$(window).resize(function() {
		center_container('#background_grid');
	});
	
});

function center_container(element_id){
	var parent_height = $(window).height();   
	var container_height = $(element_id).height();
	var offset = (parent_height - container_height)/2;
	
	
	$(element_id).css("top",offset);
	$(element_id).css("bottom",parent_height - offset);
}
*/