jQuery.noConflict();
var j$ = jQuery;

j$(function(){
	j$.datepicker.setDefaults(j$.extend({showMonthAfterYear: true}, j$.datepicker.regional['ja']));

	j$("#datepicker").datepicker({

		onSelect: function(dateText){
			var year  = dateText.substring(0, 4);
			var month = dateText.substring(5, 7);
			var day   = dateText.substring(8, 10);
                	        
			document.getElementById("dt_y").value = year;
			document.getElementById("dt_m").value = month;
			chg_day();
			document.getElementById("dt_d").value = day;
		},
	//	defaultDate: new Date (),
		changeMonth: true,
		changeYear: true,
		showButtonPanel: true,
		showOn: 'button',
		buttonImage: '/tour_search_f2/images/common_navi/ic_cal.gif',
		buttonImageOnly: true,
		minDate: 0,
		maxDate: '+300D'
	});
})

function chg_day(){

	var year = document.getElementById("dt_y").value;
	var month = document.getElementById("dt_m").value;
	if ( year && month ){
		var day_len = getNumOfDay(year,month);
		document.getElementById("dt_d").options.length = day_len+1;
		document.getElementById("dt_d").options[0] = new Option("--",'');
		for ( i = 1; i<= day_len; i++ ){
			document.getElementById("dt_d").options[i] = new Option(i,strpad(i));
		}
	}else{
		$('dt_d').innerHTML = "";	
		document.getElementById("dt_d").options.length = 1;
		document.getElementById("dt_d").options[0] = new Option("--",'');
	}
}

function getNumOfDay(year,month){

	var basey = year;		// 送られてきた月の西暦

	var ans = 0;

	var bis = basey % 4;		// bis の値が0のときは閏年


	if( bis == 0 && month == 2 ){
		ans = 29;

	}else{
		if( month == 2 ){
			ans = 28;

		}else if( month == 4 || month == 6 || month == 9 || month == 11 ){
			ans = 30;

		}else{
			ans = 31;
		}
	}


	return ans;

}
function strpad(val){ 
	return (!isNaN(val) && val.toString().length==1)?"0"+val:val; 
}