$(function(){
$("#datecheck").each(function() {   
        if($(this).val() !== '') {   
            $("#stayYear,#stayMonth,#stayDay,#stayCount,#dyn_room_num").attr("disabled", "disabled").css("background","#f0f0f0");   
        }
	});
	$("#datecheck").click(function(){
	var checked = $('#datecheck').attr('checked');
	if(!checked){
		$("#stayYear,#stayMonth,#stayDay,#stayCount,#dyn_room_num").removeAttr("disabled").css("background","#FFF");
	}else{
		$("#stayYear,#stayMonth,#stayDay,#stayCount,#dyn_room_num").attr("disabled", "disabled").css("background","#f0f0f0")
	}
	});
});

	function adultNumCheck() {
	var adultNum= document.form.adultNum.value;
	
	if (adultNum == "") {
	
	alert("大人人数を入力して下さい");
return false;
}
return true;
}