function PopupPic(sPicURL) {
     window.open( "popup.htm?"+sPicURL, "",  
     "resizable=1,HEIGHT=200,WIDTH=200");
}

function cambiadia(formulario) {
		mes=formulario.month.options[formulario.month.selectedIndex].value;
		anyo=formulario.year.options[formulario.year.selectedIndex].value;
		dia=formulario.day.options[formulario.day.selectedIndex].value;
	  formulario.sday.selectedIndex=diasemana(dia,mes,anyo);
}

function diasemana(dia,mes,anyo) {
  var currentDate = new Date(parseInt(anyo),parseInt(mes)-1,parseInt(dia)); 	
  var eldia = currentDate.getDay();
  eldia=(eldia==0) ? 6 : (eldia-1);
  return eldia;
}