<br />jQuery(document).ready(function(){
 
var banner = new Array();
 
banner[0]='https://i.servimg.com/u/f52/20/51/56/10/captur17.png';
banner[1]='https://i.servimg.com/u/f52/20/51/56/10/captur17.png';
banner[2]='https://i.servimg.com/u/f52/20/51/56/10/captur15.png';
banner[3]='https://i.servimg.com/u/f52/20/51/56/10/captur15.png';
 
document.getElementById('logocz').src= banner[Math.floor(Math.random()*banner.length)];
 
});