//requires initialisation of the following variables:
//curDay, curMonth (0-11), curYear

//date validation


var curDay = 28
var curMonth = 7
var curYear = 2008
setDatesCookie(29, 8, 2008, 30, 8, 2008)


function validDate(date, ctlDay) {
	return date.getDate() == getVal(ctlDay)
}


//clear options of select control
function clearSelect(ctl, preservedOpt) {
	for (var i=ctl.options.length-1; i>preservedOpt; i--) ctl.options[i] = null
}


//populate and set select boxes
function populateDates(frm, startBlank) {
	var preservedOpt

	if (startBlank) preservedOpt = 0
	else preservedOpt = -1

	populateDay(frm.inDay, preservedOpt)
	populateMonth(frm.inMonth, preservedOpt)
	populateYear(frm.inYear, preservedOpt)
	populateDay(frm.outDay, preservedOpt)
	populateMonth(frm.outMonth, preservedOpt)
	populateYear(frm.outYear, preservedOpt)

	setDefDates(frm, startBlank)
}


//populate day select box
function populateDay(ctl, preservedOpt) {
	clearSelect(ctl, preservedOpt)
	
	var newText
	
	for (var i=1+preservedOpt; i<32+preservedOpt; i++) {
		newText = i-preservedOpt
		if (newText < 10) newText = "0" + newText
		ctl[i] = new Option(newText, i-preservedOpt)
	}
}


//populate month select box
function populateMonth(ctl, preservedOpt) {
	var monthArray = new Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
	clearSelect(ctl, preservedOpt)
	for (var i=1+preservedOpt; i<13+preservedOpt; i++) ctl[i] = new Option(monthArray[i-1-preservedOpt], i-preservedOpt)
}


//populate year select box
function populateYear(ctl, preservedOpt) {
	clearSelect(ctl, preservedOpt)
	for (var i=1+preservedOpt; i<6+preservedOpt; i++) ctl[i] = new Option(i+curYear-1-preservedOpt, i+curYear-1-preservedOpt)
}


//set default dates
function setDefDates(frm, startBlank) {
	var defInDay, defInMonth, defInYear, defOutDay, defOutMonth, defOutYear
	var noCookie = true

	//extract dates from cookie
	var cookieArray = document.cookie.split("|")

	for (var i=0; i<cookieArray.length; i++) {
		if (cookieArray[i] == "SearchEng") {
			defInDay = parseInt(cookieArray[i+4])
			defInMonth = parseInt(cookieArray[i+5])
			defInYear = parseInt(cookieArray[i+6])
			defOutDay = parseInt(cookieArray[i+7])
			defOutMonth = parseInt(cookieArray[i+8])
			defOutYear = parseInt(cookieArray[i+9])

			noCookie = false

			break
		}
	}

	//use (today+20) for defaults if no cookie set
	if (noCookie && !startBlank) {
		var defInDate = new Date(curYear, curMonth, curDay + 20)
		var defOutDate = new Date(curYear, curMonth, curDay + 21)

		defInDay = defInDate.getDate()
		defInMonth = defInDate.getMonth() + 1
		defInYear = defInDate.getFullYear()
		defOutDay = defOutDate.getDate()
		defOutMonth = defOutDate.getMonth() + 1
		defOutYear = defOutDate.getFullYear()
	}

	//set dates
	if (!noCookie || !startBlank) {
		setVal(frm.inDay, defInDay)
		setVal(frm.inMonth, defInMonth)
		setVal(frm.inYear, defInYear)
		setVal(frm.outDay, defOutDay)
		setVal(frm.outMonth, defOutMonth)
		setVal(frm.outYear, defOutYear)
	}
}


//set select box value
function setVal(ctl, newVal) {
	for (var i=0; i<ctl.length; i++) {
		if (ctl[i].value == newVal) {
			ctl.selectedIndex = i
			break
		}
	}
}


//get select box value
function getVal(ctl) {
	return ctl[ctl.selectedIndex].value
}


//reset out date to (in date + 1)
function resetOutDate(frm) {
	var newOutDate = new Date(getVal(frm.inYear), getVal(frm.inMonth) - 1, parseInt(getVal(frm.inDay)) + 1)

	var newOutDay = newOutDate.getDate()
	var newOutMonth = newOutDate.getMonth() + 1
	var newOutYear = newOutDate.getFullYear()

	setVal(frm.outDay, newOutDay)
	setVal(frm.outMonth, newOutMonth)
	setVal(frm.outYear, newOutYear)
}


//check whether selected value of select box is empty string
function emptySel(ctl) {
	if (getVal(ctl) == "") {
		alert("Please enter your Travel Dates.")
		ctl.focus()
		return true
	}

	return false
}


//validate dates and save them to cookie
function validateDates(frm) {
	if (emptySel(frm.inDay) || emptySel(frm.inMonth) || emptySel(frm.inYear) || emptySel(frm.outDay) || emptySel(frm.outMonth) || emptySel(frm.outYear))
		return false

	var checkinDate = new Date(getVal(frm.inYear), getVal(frm.inMonth) - 1, getVal(frm.inDay))
	var checkoutDate = new Date(getVal(frm.outYear), getVal(frm.outMonth) - 1, getVal(frm.outDay))

	//validate checkin date
	if (!validDate(checkinDate, frm.inDay)) {
		alert("Please enter a valid Checkin Date.")
		frm.inDay.focus()
		return false
	}

	var curDate = new Date(curYear, curMonth, curDay)
	

	if (checkinDate - curDate < 0) {
		alert("The Checkin Date you have entered is in the past.")
		frm.inDay.focus()
		return false
	}

	var xcurDay = 29
	var xcurMonth = 7
	var xcurYear = 2008
	var xcurDate = new Date(xcurYear, xcurMonth, xcurDay)
	
	if (checkinDate - xcurDate < 0) {
		alert("Checkin date is within the next 1 days.. Search again with a later date !")
		frm.inDay.focus()
		return false
	}


	//validate checkout date
	if (!validDate(checkoutDate, frm.outDay)) {
		alert("Please enter a valid Checkout Date.")
		frm.outDay.focus()
		return false
	}

	//validate checkin - checkout difference
	if (checkoutDate - checkinDate > 2160000000) {  //25 days in milliseconds
		alert("Your period of stay should be not longer than 25 nights.\n\nIf you wish to book for more than 25 nights,\nplease send us an e-mail with your request.")
		frm.outDay.focus()
		return false
	}

	if (checkoutDate - checkinDate <= 0) {
		alert("The Checkout Date should be greater than the Checkin Date.")
		frm.outDay.focus()
		return false
	}

	//save dates to cookie
	setDatesCookie(getVal(frm.inDay), getVal(frm.inMonth), getVal(frm.inYear), getVal(frm.outDay), getVal(frm.outMonth), getVal(frm.outYear))

	return true
}


//save dates to cookie
function setDatesCookie(inDay, inMonth, inYear, outDay, outMonth, outYear) {
	var arrCookie = document.cookie.split("|")
	var i

	var defCountry = ""
	var defCity = ""
	var defSuburb = ""

	for (i=0; i<arrCookie.length; i++) {
		if (arrCookie[i] == "SearchEng") {
			defCountry = arrCookie[i+1]
			defCity = arrCookie[i+2]
			defSuburb = arrCookie[i+3]

			break
		}
	}

	document.cookie = "|SearchEng|" + defCountry + "|" + defCity + "|" + defSuburb + "|"
		+ inDay + "|" + inMonth + "|" + inYear + "|"
		+ outDay + "|" + outMonth + "|" + outYear + "|"
		+ ";path=/"
}


 //wekdays array
var wkdArray = new Array("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat")

//initialise select boxes
function initControls(frm) {
	//dates
	populateDates(frm, false)
	//setWkd(frm)
}
	
function submitForm(frm) {
	

	if (frm.destination.value == "*") {
		//validate hotel name
		if (invalidChars(frm.hotel_name, "Hotel Name", "%")) return
		
		if (trim(frm.hotel_name.value).length < 3) {
			alert("Hotel Name should be at least 3 characters long.")
			frm.hotel_name.focus()
			return
		}
	} 
	
	//check dates and submit the form
	if (validateDates(frm)) 
	frm.submit()
}

//prosess key-press event in hotel name text-box
function keyPressed(frm, pressedKeyCode) {
	if (pressedKeyCode == 13) submitForm(frm, 'Name')
}

//set weekdays
function setWkd(frm) {
	var checkinDate = new Date(getVal(frm.inYear), getVal(frm.inMonth) - 1, getVal(frm.inDay))
	var checkoutDate = new Date(getVal(frm.outYear), getVal(frm.outMonth) - 1, getVal(frm.outDay))

	frm.inWkd.value = "(" + wkdArray[checkinDate.getDay()] + ")"
	frm.outWkd.value = "(" + wkdArray[checkoutDate.getDay()] + ")"

	var numNights = Math.round((checkoutDate - checkinDate) / 86400000)

	if (numNights == 1) numNights += " night"
	else numNights += " nights"

	frm.lenStay.value = numNights
}

//check whether passed parameter is a valid number
function notNumber(number) {
	number = number.toString()

	for (var i=0; i<number.length; i++) {
		if (number.charAt(i) > "9" || number.charAt(i) < "0") return true
	}

	return false
}


//format number as currency
function formatCur(number, currencyCode) {
	if (number == "") return "on request"

	if (number < 0) {
		var sign = "-"
		number = -number
	} else var sign = ""

	number = Math.round(number * 100).toString()
	var decimal = number.substring(number.length-2, number.length)
	number = number.substring(0, number.length-2)

	var tmpNumber = ""

	for (var i=0; i<number.length; i++) {
		if (i % 3 == 0 && i != 0) tmpNumber = "," + tmpNumber
		tmpNumber = number.substring(number.length - i - 1, number.length - i) + tmpNumber
	}

	return currencyCode + " " + sign + tmpNumber + "." + decimal
}


//check whether passed validated control contains any of passes invalid characters (case insensitive)
function invalidChars(validatedControl, validatedName, charString) {
	var validatedString = trim(validatedControl.value).toLowerCase()
	charString = charString.toLowerCase()

	for (var i=0; i<validatedString.length; i++) {
		for (var j=0; j<charString.length; j++) {
			if (validatedString.charAt(i) == charString.charAt(j)) {
				var alertString = charString.split("").join("  ")
				alertString = alertString.split("     ").join("  space  ")
				alert(validatedName + " cannot contain any of the following\nillegal characters:\n\n " + alertString)
				validatedControl.focus()
				return true
			}
		}
	}

	return false
}


//check whether text-box is empty
function isEmpty(field, fieldName) {
	if (trim(field.value) == "") {
		alert("Please enter " + fieldName + ".")
		field.focus()
		return true
	}

	return false
}


//check whether selection has been made in the select-box
function notSelected(field, fieldName) {
	if (field.selectedIndex == 0) {
		alert("Please select " + fieldName + ".")
		field.focus()
		return true
	}

	return false
}


//trim string
function trim(stringToTrim) {
	var trimmedString = ""

	//left trim
	for(var i=0; i<stringToTrim.length; i++) {
		if (stringToTrim.charAt(i) != " ") break
	}

	trimmedString = stringToTrim.substring(i)

	//right trim
	for(var i=trimmedString.length-1; i>=0; i--) {
		if (trimmedString.charAt(i) != " ") break
	}

	trimmedString = trimmedString.substring(0, i + 1)

	return trimmedString
}


//validate email address
function notEmail(field) {
	var email = trim(field.value)

	if (email == "") return false

	var at = false
	var dot = false

	for (var i=0; i<email.length; i++) {
		if (email.charAt(i) == "@") at = true
		if (email.charAt(i) == "." && at) dot = true
	}

	if (at && dot && email.length > 5) return false

	alert("The e-mail you entered is not a valid e-mail address.")
	field.focus()
	return true
}