document.write('<sc'+'ript type="text/javascript">');
iprime = new Array(4);
iprime[0] = "testimonios_01.jpg";
iprime[1] = "testimonios_02.jpg";
iprime[2] = "testimonios_03.jpg";
iprime[3] = "testimonios_04.jpg";

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