document.write('<sc'+'ript type="text/javascript">');
iprime = new Array(5);
iprime[0] = "eu_01.jpg";
iprime[1] = "eu_02.jpg";
iprime[2] = "eu_03.jpg";
iprime[3] = "eu_04.jpg";
iprime[4] = "eu_05.jpg";

var patnumber = Math.floor(Math.random() * iprime.length);
document.write('</sc'+'ript>');
document.write('<a href="energia_universal.aspx"><IMG alt="Energia Universal" src="/images/' + iprime[patnumber] + '"> </a>');