$(document).ready(function(){
var normal = 1100;
if (parseInt(navigator.appVersion)>3) {
 if (navigator.appName=="Netscape") {
  winW = window.innerWidth-16;
  winH = window.innerHeight-16;
 }
 if (navigator.appName.indexOf("Microsoft")!=-1) {
  winW = document.body.offsetWidth-20;
  winH = document.body.offsetHeight-20;
 }
}
//window.onresize=velikost;
//function velikost(){
if (winW>=normal){
document.getElementById('pozadi').setAttribute('src', 'img/big/back_1.jpg');
document.getElementById('pozadi').setAttribute('width', '1200');
document.getElementById('pozadi').setAttribute('height', '950');
var imgs = ['img/big/back_1.jpg', 'img/big/back_2.jpg', 'img/big/back_3.jpg'];
}
if (winW<=normal){
document.getElementById('pozadi').setAttribute('width', '796');
document.getElementById('pozadi').setAttribute('height', '620');
var imgs = ['img/small/back_1.jpg', 'img/small/back_2.jpg', 'img/small/back_3.jpg'];
}
// }

var cnt = imgs.length;
  //$(function() {
            setInterval(Slider, 5000);
       //});

        function Slider() {
        $('#pozadi').fadeOut("slow", function() {
           $(this).attr('src', imgs[(imgs.length++) % cnt]).fadeIn("slow");
        });
        }
});

/*
$(document).ready(function(){
        var imgs = ['img/back_1.jpg', 'img/back_2.jpg'];
        var cnt = imgs.length;
  $(function() {
            setInterval(Slider, 5000);
        });

        function Slider() {
        $('#pozadi').fadeOut("slow", function() {
           $(this).attr('src', imgs[(imgs.length++) % cnt]).fadeIn("slow");
        });
        }
});
*/