function pastDate(pDay){
var nowdate = new Date();
var year = nowdate.getFullYear();
var mon = nowdate.getMonth();
var date = nowdate.getDate();
var myDate = new Date(year,mon,date+pDay);
var myYear = myDate.getFullYear(); // ”N 
var myMon = myDate.getMonth() + 1; // ŒŽ 
var myDate = myDate.getDate(); // “ú 
document.write(myYear + "." + myMon + "." + myDate);
}