function tb_getPageSize(){
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
	arrayPageSize = [w,h];
	return arrayPageSize;
}

function ustaw_zdjecie () {
	var okno = tb_getPageSize();
	var imgHeight = okno[1] * 0.8;
	var imgWidth = okno[0] * 0.8;
	$('#lightbox img').css("height", imgHeight);
	$('#lightbox').css('width', imgWidth + 18).css('marginLeft', (-1) * imgWidth / 2 + 'px');
}

$(document).ready(function() {
	if (!(document.getElementById('lightbox')))
		return;
	$('#lightbox').hide();
	$('body').append('<div id="lightboxbody"></div>');
	ustaw_zdjecie();

	$('#lightboxbody').addClass('lightboxbody');
	$("#lightbox").show(1000);
	
	// ukrywanie
	$('#lightbox').click(function() {
		$('#lightbox').hide(700);
		$('#lightboxbody').removeClass('lightboxbody');
	});
	$('#lightboxbody').click(function() {
		$('#lightbox').hide(700);
		$('#lightboxbody').removeClass('lightboxbody');
	});
});