function open_foto(url, target, width, height) {
options = 'margin=0,scrollbars=0,toolbar=0,resizable=yes,menubar=0,width=' + width + ',height=' + height;
win = window.open(url, target, options);
win.focus();
return ('object' == typeof(win)) ? true : false;
}

function open_mapa(url, target, width, height) {
options = 'margin=0,scrollbars=0,toolbar=0,resizable=yes,menubar=0,width=' + width + ',height=' + height;
win = window.open(url, target, options);
win.focus();
return ('object' == typeof(win)) ? true : false;
}