var bg_image_height       = 940;
var bg_image_width        = 1680;
var bg_image_ratio        = bg_image_height / bg_image_width;
var bg_image_min_height    = 600;

function scale_image()
{
	var browser_height   = $('body').height();
	var browser_width    = $('body').width();

	if ((browser_height / browser_width) > bg_image_ratio)
	{
		$('#bg-image').height(browser_height);
		$('#bg-image').width(browser_height / bg_image_ratio);
	}
	else
	{
		$('#bg-image').height(browser_width * bg_image_ratio);
		$('#bg-image').width(browser_width);
	}
	$('#bg-image').css('left', (browser_width - $('#bg-image').width()) / 2);
	$('#bg-image').css('top', (browser_height - $('#bg-image').height()) / 2);
}

$(document).ready(function()
{
	scale_image();
	$(window).resize(function()
	{
		scale_image();
	});
});