function cal(year,month,day) {
 today=new Date();
 if (!year) var year=today.getFullYear();
 if (!month) var month=today.getMonth();
 else month--;
 if (!day) var day=today.getDate();
 var leap_year=false;
 if ((year%4 == 0 && year%100 != 0) || (year%400 == 0)) leap_year=true;
 lom=new Array(31,28+leap_year,31,30,31,30,31,31,30,31,30,31);
 dow=new Array("日","月","火","水","木","金","土");
 var days=0;
 for (var i=0; i < month; i++) days+=lom[i];
 var week=Math.floor((year*365.2425+days)%7);
 var j=0;
 var when=year+"年 "+(month+1)+"月";
 var calendar="<table summary=\""+when+"のカレンダー\">\n";
 calendar+="<caption>"+when+"<\/caption>\n<tr>";
 for (i=0; i < 7; i++) calendar+="<td>"+dow[i]+"<\/td>";
 calendar+="<\/tr>\n<tr>";
 for (i=0; i < week; i++,j++) calendar+="<td><\/td>";
 
 for (i=1; i <= lom[month]; i++) {
	 var hinichi = i;
	 var eve = new Array(21,26);//Array内にイベント日にちを入れる
	 for(k=0;k<eve.length;k++){
	 if (hinichi==eve[k]){hinichi="<strong><a href=\"http://www.kobe-caremane.net/calender/index.html#d"+ eve[k] +"\">" +hinichi+ "<\/a><\/strong>"}else{hinichi};
	 };
  calendar+="<td";
  if (day == i) {calendar+=" class=\"today\""};
  calendar+=">"+ hinichi +"<\/td>";
  j++;
		if (j > 6) {
		 calendar+="<\/tr>\n<tr>";
		 j=0;
		}
 	}

 for (i=j; i > 6; i++) calendar+="<td><\/td>";
 calendar+="<\/tr>\n<\/table>\n";
 return calendar;
}