arrfotor=[["img_01.jpg","1"],["img_02.jpg","2"], ["img_03.jpg","3"], ["img_04.jpg","4"], ["img_05.jpg","5"], ["img_06.jpg","6"], ["img_07.jpg","7"], ["img_08.jpg","8"]];
var pos = parseInt(Math.random()*arrfotor.length);
ffoto = arrfotor[pos][0];
idfoto = arrfotor[pos][1];
document.write("<a href=\"http://www.conservatoriourense.org\"><img border=\"0\" src=\"images/"+ffoto+"\" width=\"770\" height=\"105\" alt=\"CMUS OURENSE - Conservartorio de música de Ourense\"></a>");