function getWeekNr()
{
var today = new Date();
Year = takeYear(today);
Month = today.getMonth();
Day = today.getDate();
now = Date.UTC(Year,Month,Day+1,0,0,0);
var Firstday = new Date();
Firstday.setYear(Year);
Firstday.setMonth(0);
Firstday.setDate(1);
then = Date.UTC(Year,0,1,0,0,0);
var Compensation = Firstday.getDay();
if (Compensation > 3) Compensation -= 4;
else Compensation += 3;
NumberOfWeek = Math.round((((now-then)/86400000)+Compensation)/7);
return NumberOfWeek;
}


function takeYear(theDate)
{
x = theDate.getYear();
var y = x % 100;
y += (y < 38) ? 2000 : 1900;
return y;
}

function getAno(){
	var today = new Date();
 	ano = takeYear(today);
	return ano;
}


function mostrar(){
	getWeekNr();
	getAno();
	NumberOfWeek +=1;
	parent.central.location = ano+"_"+NumberOfWeek+".html";

}