function Imagen_Aleatoria() {

var cc1 = Math.floor(Math.random() * collage1.length)
var cc2 = Math.floor(Math.random() * collage2.length)
var cc3 = Math.floor(Math.random() * collage3.length)
if (cc1 == 0) { cc1 = 1 } 
if (cc2 == 0) { cc2 = 1 } 
if (cc3 == 0) { cc3 = 1 } 

	 document.write ('<span class="marco3"><img src="'+collage1[cc1]+'" width="125" height="125" alt="'+pie1[cc1]+'" border="0" /></span>');
	 document.write ('<span class="marco3"><img src="'+collage2[cc2]+'" width="125" height="125" alt="'+pie2[cc2]+'" border="0" /></span>');
	 document.write ('<span class="marco3"><img src="'+collage3[cc3]+'" width="125" height="125" alt="'+pie3[cc3]+'" border="0" /></span>');

}

// biblioteques
var collage1=new Array(); 
collage1[1] = '/seccion/lluisvives/graf/Abat_oliba.jpg';
collage1[2] = '/seccion/lluisvives/graf/andorra.jpg';
collage1[3] = '/seccion/lluisvives/graf/girona.jpg';
collage1[4] = '/seccion/lluisvives/graf/illes_balears.jpg';
collage1[5] = '/seccion/lluisvives/graf/internacional_catalunya.jpg';
collage1[6] = '/seccion/lluisvives/graf/alicante.jpg';

var pie1=new Array(); 
pie1[1] = 'Universitat Abat Oliba CEU';
pie1[2] = 'Universitat d&#8217;Andorra';
pie1[3] = 'Universitat de Girona';
pie1[4] = 'Universitat de les Illes Balears';
pie1[5] = 'Universitat Internacional de Catalunya';
pie1[6] = 'Universitat d&#8217;Alacant';

// mes biblioteques
var collage2=new Array(); 
collage2[1] = '/seccion/lluisvives/graf/jaumeI.jpg';
collage2[2] = '/seccion/lluisvives/graf/lleida.jpg';
collage2[3] = '/seccion/lluisvives/graf/miguel_hernandez.jpg';
collage2[4] = '/seccion/lluisvives/graf/perpinya.jpg';
collage2[5] = '/seccion/lluisvives/graf/poli_catalunya.jpg';
collage2[6] = '/seccion/lluisvives/graf/poli_valencia.jpg';

var pie2=new Array(); 
pie2[1] = 'Universitat Jaume I';
pie2[2] = 'Universitat de Lleida';
pie2[3] = 'Universitat Miguel Hernández d&#8217;Elx';
pie2[4] = 'Universitat de Perpinyà Via Domitia';
pie2[5] = 'Universitat Politècnica de Catalunya';
pie2[6] = 'Universitat Politècnica de València';

// i mes biblioteques
var collage3=new Array(); 
collage3[1] = '/seccion/lluisvives/graf/pompeu_fabra.jpg';
collage3[2] = '/seccion/lluisvives/graf/ramon_llull.jpg';
collage3[3] = '/seccion/lluisvives/graf/rovira_virgili.jpg';
collage3[4] = '/seccion/lluisvives/graf/uab.jpg';
collage3[5] = '/seccion/lluisvives/graf/uni_barna.jpg';
collage3[6] = '/seccion/lluisvives/graf/uoc.jpg';
collage3[7] = '/seccion/lluisvives/graf/valencia.jpg';
collage3[8] = '/seccion/lluisvives/graf/vic.jpg';

var pie3=new Array(); 
pie3[1] = 'Universitat Pompeu Fabra';
pie3[2] = 'Universitat Ramon Llull';
pie3[3] = 'Universitat Rovira i Virgili';
pie3[4] = 'Universitat Autònoma de Barcelona';
pie3[5] = 'Universitat de Barcelona';
pie3[6] = 'Universitat Oberta de Catalunya';
pie3[7] = 'Universitat de València';
pie3[8] = 'Universitat de Vic';

Imagen_Aleatoria()