//variables
var TOP_cookie_name	= 'TOP_id';								//nazov cookie
var TOP_cookie_last	= 60;									//expiracie cookie v minutach
var TOP_cookie_val	= 34362067343868;						//value for cookie if it doesn't exist
var TOP_referer		= document.referrer;							//zdroj navstevy
var TOP_cur_page	= document.URL;								//navstivena stranka
var TOP_height		= window.screen.height;							//height of screen
var TOP_width		= window.screen.width;							//width of screen
var TOP_os		= window.navigator.platform;						//operacny system
var TOP_browser		= navigator.userAgent;							//prehliadac
var TOP_domain_name	= window.location.host;							//nazov momentalnej domeny
var TOP_destroy_ck	= 0;									//neznicit cookie je prednastavene
var TOP_isActive	= true;									//okno je aktivne

if(TOP_referer.indexOf(location.protocol + "//" + TOP_domain_name)!==0)
	TOP_destroy_ck = 1;		//navstevnik prichadza z ineho zdroja, cookie ma byt znicena

window.onfocus = function () { 
	TOP_isActive = true;		//okno je aktivne
}; 

window.onblur = function () { 
	TOP_isActive = false;		//okno nie je aktivne
}; 

//tracking code
function TOP_tracking()
	{
		//just a test
		this.msg = function ck(inp)
			{
				alert(TOP_cookie_name);
				return true;
			}

		//create cookie
		this.new_cookie = function createCookie(name, value, days)
			{
				if (days)
					{
						var date = new Date();
						date.setTime(date.getTime() + (TOP_cookie_last * 24 * 60 * 60 ));
						var expires = "; expires=" + date.toGMTString();
					}
						else var expires = "";
				document.cookie = name + "=" + value + expires + "; path=/";
			}

		//read cookie
		this.read_cookie = function getCookie(c_name)
			{
				if (document.cookie.length > 0)
					{
						c_start = document.cookie.indexOf(c_name + "=");
						if (c_start != -1)
							{
								c_start = c_start + c_name.length + 1;
								c_end = document.cookie.indexOf(";", c_start);
								if (c_end == -1)
									{
										c_end = document.cookie.length;
									}
								return unescape(document.cookie.substring(c_start, c_end));
							}
					}
				return "";
			}

		//function to generate random number
		this.randnum = function TOP_randnumber()
			{
				return Math.floor(Math.random()*99999);
			}
	}

o_obj = new TOP_tracking();

if( (o_obj.read_cookie(TOP_cookie_name)=='') || (TOP_destroy_ck==1) )
	{
		//alert('no cookie');
		o_obj.new_cookie(TOP_cookie_name,TOP_cookie_val,1);
		//let's add referer information
		var TOP_refer = '&r=' + encodeURIComponent(TOP_referer);
	}
		else
			{
				//alert(o_obj.read_cookie(TOP_cookie_name));
				//cookie exists, referer isn't needed
				var TOP_refer = '';
			}

//define path of source image
var TOP_img_src      = "https://www.janhvizdak.com/top/tr_img.png?s=";var TOP_img_location = TOP_img_src + o_obj.randnum() + '&b=' + encodeURIComponent(TOP_browser) + '&o=' + encodeURIComponent(TOP_os) + '&w=' + encodeURIComponent(TOP_width) + 'x' + encodeURIComponent(TOP_height) + '&c=' + encodeURIComponent(o_obj.read_cookie(TOP_cookie_name)) + TOP_refer + '&p=' + encodeURIComponent(TOP_cur_page) + '&i=' + encodeURIComponent(TOP_identifier);

//pridaj obrazok do zdrojaku
document.write("<img src='"+TOP_img_location+"' alt='TOP tracking' title='TOP tracking' style='display:block;' id='TOP_tracker' />");

var TOP_img_element = document.getElementById('TOP_tracker');

//nacitaj obrazok kazdych x sekund
setInterval(function()
	{
		if(window.TOP_isActive!==false)
			TOP_img_element.src = TOP_img_src + o_obj.randnum() + '&c=' + o_obj.read_cookie(TOP_cookie_name);
			o_obj.new_cookie(TOP_cookie_name,o_obj.read_cookie(TOP_cookie_name),1);
	}, 15000);