var banner = new Array();
         
        banner.push('http://img38.imageshack.us/img38/8672/banshini.png');
        banner.push('http://img192.imageshack.us/img192/3798/banhumain.png');
        banner.push('http://img684.imageshack.us/img684/5604/banange.png');
        banner.push('http://img803.imageshack.us/img803/9544/bandemon.png'); 
        document.getElementById('i_logo').src= banner[Math.floor(Math.random()*banner.length)];