while(true){
aleatorio = Math.random();
numero = Math.round(aleatorio * 12);

if (numero == 0){
imagen = "http://img6.imagebanana.com/img/wnxahzgx/onepiecebanner1.png";
break;}

if (numero == 1){
imagen = "http://img6.imagebanana.com/img/oyr1o7hn/onepiecebanner2.png";
break;}

if (numero == 2){
imagen = "http://img6.imagebanana.com/img/5p1a0njz/onepiecebanner3.png";
break;}

if (numero == 3){
imagen = "http://img6.imagebanana.com/img/5s7k6zjz/onepiecebanner4.png";
break;}



}
document.write('<a href="https://uniconrpg.forumieren.com/" target="_self" ><img src="' + imagen + '" border=0 style="width: 806px; height: 444px"></a>');