function resolucion() {
var url640x480 = "parra-taberna.html";
var url800x600 = "parra-taberna.html";
var url1024x768 = "parra-taberna.html";
var urlbig = "parra_taberna.html";
if ((screen.width == 640) && (screen.height == 480))
window.location.href= url640x480;
else if ((screen.width == 800) && (screen.height == 600))
window.location.href= url800x600;
else if ((screen.width == 1024) && (screen.height == 768))
window.location.href= url1024x768;
else if ((screen.width > 1024) && (screen.height > 768))
window.location.href= urlbig;
else window.location.href= url640x480;
}