// JavaScript Document
function getCSS()
{
datetoday = new Date();
timenow=datetoday.getTime();
datetoday.setTime(timenow);
thehour = datetoday.getHours();
if (thehour > 19)
display = "estilos_noche.css";
else if (thehour > 6)display = "estilos_dia.css";
else
display = "estilos_noche.css";
var css = '<';  css+='link rel="stylesheet" href=' + display + ' \/';  css+='>';
document.write(css);}
// End -->}