function Todaydate()
{
mydate=new Date();
Ye=mydate.getFullYear();
Mo=mydate.getMonth()+1;
Da=mydate.getDate();
Day=mydate.getDay();
if(Mo < 10) { Mo = "0" + Mo; } 
document.write("<a href=http://www.keio.ac.jp/calendar/calendar_"+Ye+Mo+".html target=_blank>");

}