var banner = new Array();
 
banner.push('https://img4.hostingpics.net/pics/159874591L.png');
banner.push('https://img4.hostingpics.net/pics/893127442L.png');
banner.push('https://img4.hostingpics.net/pics/911385323L.png');
banner.push('https://img4.hostingpics.net/pics/376614454L.png');
banner.push('https://img4.hostingpics.net/pics/237582135L.png');
banner.push('https://img4.hostingpics.net/pics/315164866L.png');
banner.push('https://img4.hostingpics.net/pics/858541237L.png');


 
document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];
 
setInterval("document.getElementById('logo').firstChild.src= banner[Math.floor(Math.random()*banner.length)];",3000);