function CargarFoto(img, ancho, alto){
  derecha=(screen.width-ancho)/2;
  arriba=(screen.height-alto)/2;
  string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
  fin=window.open(img,"",string);
}



function newWin(link,w,h,s,r) {
  var winFeatures = 'width=' + w + ',height=' + h + ',scrollbars=' + s + ',resizable=' + r;
  var bookWindow = window.open(link, "", winFeatures);
}