// JavaScript Document
<!--
var dtCh= "/";
var minYear=1900;
var maxYear=2100;
var bufferDays = 2;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("the date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("please enter a valid date")
		return false
	}
return true
}

function inPast(myin, myout) {
	var pos1=myin.indexOf(dtCh)
	var pos2=myin.indexOf(dtCh,pos1+1)
	var inMonth=myin.substring(0,pos1)
	var inDay=myin.substring(pos1+1,pos2)
	var inYear=myin.substring(pos2+1)
	
	var pos3=myout.indexOf(dtCh)
	var pos4=myout.indexOf(dtCh,pos3+1)
	var outMonth=myout.substring(0,pos3)
	var outDay=myout.substring(pos3+1,pos4)
	var outYear=myout.substring(pos4+1)

	var checkin = new Date(inYear, inMonth-1, inDay);
	var checkout = new Date(outYear, outMonth-1, outDay);
	var today = new Date();
	var minCheckin = new Date();
	minCheckin.setDate(minCheckin.getDate()+bufferDays);
	
	if(checkout.getTime() <= checkin.getTime()) {
		alert("check out must occur after check in, please select a new date");
		return false;
	}
	if (checkin < today) {
		alert("check in may not occur in the past, please select a new date");
		return false;
	}
	if (checkin < minCheckin) {
		alert("we cannot support reservations made within " +bufferDays+ " days of check in, please select a new date");
		return false;
	}
	return true;
}
 
function format_dates() {
	var thisIn=document.getElementById('inDate');
	var thisCheckIn=document.getElementById('checkinDate');
	var pos1=thisIn.value.indexOf(dtCh)
	var pos2=thisIn.value.indexOf(dtCh,pos1+1)
	var inMonth=thisIn.value.substring(0,pos1)
	var inDay=thisIn.value.substring(pos1+1,pos2)
	var inYear=thisIn.value.substring(pos2+1)
	thisCheckIn.value = inYear+'-'+inMonth+'-'+inDay; 
	
	thisOut=document.getElementById('outDate');
	thisCheckOut=document.getElementById('checkoutDate');
	var pos3=thisOut.value.indexOf(dtCh)
	var pos4=thisOut.value.indexOf(dtCh,pos3+1)
	var outMonth=thisOut.value.substring(0,pos3)
	var outDay=thisOut.value.substring(pos3+1,pos4)
	var outYear=thisOut.value.substring(pos4+1)
	thisCheckOut.value = outYear+'-'+outMonth+'-'+outDay; 

 }
 
 function set_outbox() {
	 var checkin=document.getElementById('inDate');
	 var thisCheckout=document.getElementById('outDate');
	 if (isDate(checkin.value)==true) {
		var pos1=checkin.value.indexOf(dtCh)
		var pos2=checkin.value.indexOf(dtCh,pos1+1)
		var inMonth=parseInt(checkin.value.substring(0,pos1))
		var inDay=parseInt(checkin.value.substring(pos1+1,pos2))
		var inYear=parseInt(checkin.value.substring(pos2+1))
		var checkout = new Date(inYear, inMonth-1, inDay+1);
		var outDay = checkout.getDate();
		var outMonth = checkout.getMonth()+1;
		var outYear = checkout.getFullYear();
		thisCheckout.value = outMonth+'/'+outDay+'/'+outYear;
	 }
 }
 
 function set_today() {
	 myInbox=document.getElementById('inDate');
	 myOutbox=document.getElementById('outDate');
	 if (myInbox.value == 'mm/dd/yyyy') {
	 	today = new Date();
	 	tomorrow = new Date(today.getFullYear(), today.getMonth(), today.getDate()+1);
	 	myInbox.value = (today.getMonth()+1)+'/'+today.getDate()+'/'+today.getFullYear();
	 	myOutbox.value = ((tomorrow.getMonth()+1)+'/'+tomorrow.getDate()+'/'+tomorrow.getFullYear());
	 }
	 else {
		 set_outbox();
	 } 
 }
 

 //-->