// date acquisition  //////////////////////////////////////////////////////////////

var tday  = new Date();
/*今日の日付取得*/
var year  = tday.getFullYear(); /* 年を取得 */
var month = tday.getMonth()+1;    /* 月を取得*/
var day   = tday.getDate();     /* 日を取得 */

/*今日+7の日付の取得*/
var preset_day = day + 0;
var preset_month = month;
var preset_year = year;
if(month==2){
  if((year%4==0) && (year%100!=0) || (year%400==0)){
    daymax=29; /* 閏年 */
  }else{
    daymax=28;
  }
}else if(month==4 || month==6 || month==9 || month==11){
  daymax=30;
}else{
  daymax=31;
}
if (preset_day > daymax) {
  preset_day = preset_day - daymax;
  preset_month++;
}
if (preset_month > 12) {
  preset_month = preset_month - 12;
  preset_year++;
}

/*初期日付の翌日の日付取得*/
var yday = new Date(preset_year,(preset_month-1),(preset_day+1));
var year2  = yday.getFullYear(); /* 年を取得 */
var month2 = yday.getMonth()+1;    /* 月を取得*/
var day2   = yday.getDate();     /* 日を取得 */
/*今日の日付プルダウン*/
function tnen(){
	for(i=0; i<2; i++){
		cur_year = preset_year+i;
		yy = cur_year + "";
		yy = yy.substr(2,2);
		document.write("<option value=" + cur_year + ((i==0) ? " selected" : "") + ">" + yy + "<\/option>\n");
	}
}

function ttuki(){
	for(i=1; i<=12; i++){
		var dispMonth = i;
		if (dispMonth < 10) {
			dispMonth = '0' + i;
		}
		document.write("<option value=" + dispMonth + ((i==preset_month) ? " selected" : "") + ">" + i + "<\/option>\n");
	}
}

function thi(){
	daymax = 31;
	for(i=1; i<=daymax; i++){
	  /* 今日の日付を選択 */
		var dispDay = i;
		if (dispDay < 10) {
			dispDay = '0' + i;
		}
	  document.write("<option value="+ dispDay +((i==preset_day) ? " selected" : "")+">"+ i +"<\/option>\n");
	}
}
/*初期日付の翌日の日付プルダウン*/
function ynen(){
	for(i=0; i<2; i++){
		cur_year = year2+i;
		yy = cur_year + "";
		yy = yy.substr(2,2);
		document.write("<option value=" + cur_year + ((cur_year==year2) ? " selected" : "") + ">" + yy + "<\/option>\n");
	}
}

function ytuki(){
	for(i=1; i<=12; i++){
		var dispMonth = i;
		if (dispMonth < 10) {
			dispMonth = '0' + i;
		}
		document.write("<option value=" + dispMonth + ((i==month2) ? " selected" : "") + ">" + i + "<\/option>\n");
	}
}

function yhi(){
	daymax = 31;
	for(i=1; i<=daymax; i++){
	  /* 今日の日付を選択 */
		var dispDay = i;
		if (dispDay < 10) {
			dispDay = '0' + i;
		}
	  document.write("<option value="+ dispDay +((i==day2) ? " selected" : "")+">"+ i +"<\/option>\n");
	}
}