var dtCh= "/";
var minYear=1900;
var maxYear=2100;

function submitCityPageValidation(objDate,objHotelName){
	if (!submitDateValidation(objDate)){
		return false;
	}
	if (!submitHotelValidation(objHotelName)){
		return false;
	}
return true;
}

function submitCityGroupPageValidation(objDate,objHotelName,objCityName){
	if (!submitCityPageValidation(objDate,objHotelName)){
		return false;
	}
	if (!submitCityNameValidation(objCityName)){
		return false;
	}
return true;
}

function submitNewSearchValidation(objDate,objHotelName,objCityName,objHotelNameInitial,objCityNameInitial){
	if (objHotelNameInitial.value != objHotelName.value){
		document.frm.hotelCode.value = '';
	}
	if (objCityNameInitial.value != objCityName.value){
		document.frm.cityCode.value = '';
	}	
	if (!submitCityGroupPageValidation(objDate,objHotelName,objCityName)){
		return false;
	}
return true;
}

function submitDateValidation(objDate){
	if (isDate(objDate.value)==false){
		objDate.focus();
		return false;
	}
return true;
}

function submitCityNameValidation(objCityName)
{
	if (objCityName.value.length >= 0 && objCityName.value.length < 3 )
	{
		alert( 'Please enter a city name with at least three characters to perform the search.' );
		objCityName.focus();
		return false;
	}
return true;
}

function submitHotelValidation(objHotelName)
{
	if (objHotelName.value.length > 0 &&
		objHotelName.value.length < 3 )
	{
		alert( 'Please enter a property name with at least three characters to perform the search.' );
		objHotelName.focus();
		return false;
	}
return true;
}

function openWindow(url, name, w, h) 
{
	var options = "width=" + w + ",height=" + h + ",";
	options += "resizable=no,scrollbars=yes,status=no,";
	options += "menubar=no,toolbar=no,location=no,directories=no";
	var hotelSearchWin = window.open(url, name, options);
	
	if (hotelSearchWin)
	{
	  hotelSearchWin.focus();
	} else 
	{
	  alert("Search not possible! Please turn off pop-up blocking to enable search.");
	}
}

function closeChildWindow(name) 
{
    var hotelSearchWin = window.open('', name);
    hotelSearchWin.close();
}

function setHotel(hotelCode, hotelName) {
	document.frm.hotelCode.value = hotelCode;
	document.frm.hotelName.value = hotelName;
	return true;
}

function hiddenValueOpenWindow(url, notUsed, name, w, h) 
{
	var newUrl = url + document.frm.cityCode.value;
	openWindow(newUrl, name, w, h);
}

function listValueOpenWindow(url, notUsed, name, w, h) 
{
	var newUrl = url + document.frm.city.options[document.frm.city.selectedIndex].value;
	openWindow(newUrl, name, w, h);
}

function breakoutFrame(url)
{
	if (window.top != window.self) 
	{
		window.top.location=url
	}
}

function changeCity(city)
{
	document.frm.hotelCode.value='';
	document.frm.hotelName.value='';
	
	if (city.value.length==4)
	{
		document.frm.cityCode.value=city.value;
	}
}

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var 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){
    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 strDay=dtStr.substring(0,pos1)
	var strMonth=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 : dd/mm/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
	}
	
	var now = new Date();
	var today = new Date(now.getYear(),now.getMonth(),now.getDate());
	var testdate = new Date(strYear,strMonth-1,strDay);
    if (testdate < today){
     	alert("Date must not be in the past")
        return false;
    }
return true
}

function addToFavorites()
{
	var urlAddress = "http://www.hotelscomparison.com";
	var pageName = "Hotels Comparison";

if (window.external)
{
	window.external.AddFavorite(urlAddress,pageName)
}
else
{ 
	alert("Sorry! Your browser doesn't support this function.");
}
}