function setFoto(dir,obj) {
	document.getElementById('fotoDetalle').src=dir;
	theParagraph=(document.getElementById('lista-fotos'));	
	for( var x = 0; x < theParagraph.childNodes.length; x++ ) {
		if( theParagraph.childNodes[x].nodeName.toLowerCase() == 'li' ) {
			for( var y = 0; y < theParagraph.childNodes[x].childNodes[0].attributes.length; y++ ) {
				if( theParagraph.childNodes[x].childNodes[0].attributes[y].nodeName.toLowerCase() == 'class' ){
					theParagraph.childNodes[x].childNodes[0].attributes[y].nodeValue="normal";
					if(theParagraph.childNodes[x].childNodes[0].childNodes[0].nodeValue==obj) theParagraph.childNodes[x].childNodes[0].attributes[y].nodeValue="activo";
				}
			}
	  	} 
	}
}