/*西暦プルダウン作成関数*/
function CreateYears() {
var i;    date = new Date();
var nowYear = (date.getYear()<1000)?	 date.getYear()+1900:date.getYear();
var year = nowYear;
var optionTag;
for( i = 0; i < 3; i++ ) {
	if( year == nowYear ) {
		optionTag = "<option value=\"" + year + "\" selected>" + year + "</option>\n";
	} else {
		optionTag = "<option value=\"" + year + "\">" + year + "</option>\n";
	}
		year++;
		document.write( optionTag );
}}

/*月プルダウン作成関数*/
function CreateMonths() {
var i;
date = new Date();
var nowMonth = date.getMonth() + 1;
var optionTag;

for( i = 1; i <= 12; i++ ) {
	if( i == nowMonth ) {
		optionTag = "<option value=\"" + i + "\" selected>" + i + "</option>\n";
	} else {
		optionTag = "<option value=\"" + i + "\">" + i + "</option>\n";
	}
document.write( optionTag );
}}

/*日プルダウン作成関数*/
function CreateDays() {
var i;
date = new Date();
var nowDay = date.getDate();
var optionTag;
for( i = 1; i <= 31; i++ ) {
	if( i == nowDay ) {
		optionTag = "<option value=\"" + i + "\" selected>" + i + "</option>\n";
	} else {
		optionTag = "<option value=\"" + i + "\">" + i + "</option>\n";
	}
document.write( optionTag );
}}

/*プルダウン内日付変更関数*/
function setDay(){
var year = document.getElementById( "year" ).value;
var month = document.getElementById( "month" ).value;
var day = document.getElementById( "day" );
var lastday = february( year, month );
var itemnum = day.length;
if ( lastday - 1 < day.selectedIndex ) {
	day.selectedIndex = lastday - 1;
}    day.length = lastday;
for ( cnt = ( itemnum + 1 ); 
	cnt <= lastday; cnt++ ) {
	day.options[cnt - 1].text = cnt;
}}

/*2月の日付決定関数*/
function february( year, month ){
var lastday = new Array( 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 );
if ( ( (year % 4 == 0) && (year % 100 != 0) ) || ( year % 400 == 0 ) ) {
lastday[1] = 29;
}
return lastday[month - 1];
}

/*ボタン押時に日付を表示する関数*/
function showDate() {
var year = document.getElementById( "year" ).value;
var month = document.getElementById( "month" ).value;
var day = document.getElementById( "day" ).value;
var show = "あなたが選択したのは、" + year + "年" + month + "月" + day + "日です。";
var selectDate = document.getElementById( "selectDate" );
selectDate.innerHTML = show;
return false;
}

/*URLの発行処理*/
function do_url() {
<!-- baseURLのURLを管理画面で取得できるプラン一覧にセットする// -->  
var baseURL = "http://www.jhpds.net/ryokusui/uw/uwp3100/uww3101.do?yadNo=372144";
var stayYear = document.getElementById( "year" ).value;
var stayMonth = document.getElementById( "month" ).value;
var stayDay = document.getElementById( "day" ).value;
var stayCount = document.F1.stayCount.value;
var adultNum = document.F1.adultNum.value;
var roomCount = document.F1.roomCount.value;
var listURL = baseURL	+ "&stayYear=" + stayYear + "&stayMonth=" + stayMonth + "&stayDay=" + stayDay + "&stayCount=" + stayCount + "&adultNum=" + adultNum	+ "&roomCount=" + roomCount;
<!-- 同一ウィンドウ遷移の場合は残す// -->  
//document.location.href = listURL;
<!-- 別ウィンドウ遷移の場合は残す// -->  
window.open(listURL);
}