Thank you so much!
Even I asked on the wrong forum, I found the correct person... Now it works perfect...
Just a Note: window.navigate("url") doesn't works on the last versions of Firefox nor Chrome (just on IExplorer); your suggested method window.location "url"; works on both & IExplorer too.
Thanks again!. At the end it was:
<script type="text/javascript">
var current= new Date()
var day=current.getDay()
if (day==0)
window.location = "http://tialele.weebly.com/platillos.html";
if (day==1)
window.location = "http://tialele.weebly.com/lunes.html";
if (day==2)
window.location = "http://tialele.weebly.com/martes.html";
if (day==3)
window.location = "http://tialele.weebly.com/miercoles.html";
if (day==4)
window.location = "http://tialele.weebly.com/jueves.html";
if (day==5)
window.location = "http://tialele.weebly.com/viernes.html";
if (day==6)
window.location = "http://tialele.weebly.com/platillos.html";
</script>