var FlightsTypeEnum = {arrival:"ARRIVAL", departure:"DEPARTURE"}  //An Enum type object used to denote flight type
var flightTableMinimized = true;								  //expanded/minimized state of the data table	
var MIN_FLIGHT_ROWS = 3;										  //number of flight rows to show in the minimized state
var MAX_FLIGHT_ROWS = 10;										  //number of flight rows to show in the maximized state
var currentDateTime = new Date();								  //current data and time
var currentTime = null;											  //current time
var currentDate = null;											  //current date
var flights = null;												  //global variable holding flights returned from the server.

var OrderByEnum = {time:"time", flight:"flight number", route:"route", status:"status", terminal:"terminal"};  //An Enum object specifying the "order by" column of the data column 
var orderBy = OrderByEnum.time;			//can be by "time", "flight number", "route", "status", and "terminal" //global variable storing the current "order by" column
var sortDirection = 1;					//global variable storing an "order direction" (1 for ascending and -1 for descending)

var timeSortDirection = 1;
var flightSortDirection = -1;
var routeSortDirecton = -1;
var statusSortDirection = -1;
var terminalSortDirection = -1;

var cities = null;	
											//global variable storing the names of cities.  This is to be used for the Autocomplete functionality on the origin/destination field


// a global month names array
var gsMonthNames = new Array(					
'January',
'February',
'March',
'April',
'May',
'June',
'July',
'August',
'September',
'October',
'November',
'December'
);

// a global day names array
var gsDayNames = new Array(
'Sunday',
'Monday',
'Tuesday',
'Wednesday',
'Thursday',
'Friday',
'Saturday'
);
// Zero-Fill

//debug function to inspect a javascript object
function dumpObj(obj, name, indent, depth) {
              if (depth > MAX_DUMP_DEPTH) {
                     return indent + name + ": <Maximum Depth Reached>\n";
              }

              if (typeof obj == "object") {
                     var child = null;
                     var output = indent + name + "\n";
                     indent += "\t";

                     for (var item in obj)
                     {

                           try {
                                  child = obj[item];
                           } catch (e) {
                                  child = "<Unable to Evaluate>";
                           }

                           if (typeof child == "object") {
                                  output += dumpObj(child, item, indent, depth + 1);
                           } else {
                                  output += indent + item + ": " + child + "\n";
                           }

                     }
                     return output;

              } else {
                     return obj;
              }
       }

//Overriding the String, number, and date prototypes for some formatting later on
String.prototype.string = function(l) { var s = '', i = 0; while (i++ < l) { s += this; } return s; }
Number.prototype.zf = function(l) { return this.toString().zf(l); }
String.prototype.zf = function(l) { return '0'.string(l - this.length) + this; }
Date.prototype.format = function(f)
{
    if (!this.valueOf())
        return '&nbsp;';

    var d = this;

    return f.replace(/(yyyy|mmmm|mmm|mm|dddd|ddd|dd|hh|nn|ss|a\/p)/gi,
        function($1)
        {
            switch ($1.toLowerCase())
            {
            case 'yyyy': return d.getFullYear();
            case 'mmmm': return gsMonthNames[d.getMonth()];
            case 'mmm':  return gsMonthNames[d.getMonth()].substr(0, 3);
            case 'mm':   return (d.getMonth() + 1).zf(2);
            case 'dddd': return gsDayNames[d.getDay()];
            case 'ddd':  return gsDayNames[d.getDay()].substr(0, 3);
            case 'dd':   return d.getDate().zf(2);
            case 'hh':   return d.getHours().zf(2);
            case 'nn':   return d.getMinutes().zf(2);
            case 'ss':   return d.getSeconds().zf(2);
            case 'a/p':  return d.getHours() < 12 ? 'a' : 'p';
            }
        }
    );
}

tmpDate = new Date();
currentDateStr = tmpDate.format('ddd dd mmmm yyyy');
//currentDateStr = "Thu 27 October 2005"
	
function TextBoxHint(inputBox, textHint)
{
	if(!document.getElementById) return false;				// If browser does not understand, get out now!
	if(!document.getElementById(inputBox)) return false;	// If text box is not found get out!
	var inputBoxId = document.getElementById(inputBox);		// Assign the hbw_postcode to postCodeBox
	inputBoxId.value = textHint;
	
	$(inputBox).addEvent("focus", function()							// When the user clicks in the box
	{
		if(inputBoxId.value == textHint)					// If the value is the default value
			inputBoxId.value = '';							// Clear the box
	});
	$(inputBox).addEvent("blur", function()
	{
	if(inputBoxId.value == '')							// If the box is empty
			inputBoxId.value = textHint;					// Fill the box with instruction
	});
	
}

//updates the data and time in the specified format on the portlet
function updateDateAndTime()
{
	currentTime = currentDateTime.format('hh:nn')+" GMT";
	currentDate = currentDateTime.format('ddd dd mmm');
	
	//document.getElementById('time').innerHTML = currentTime;
	document.getElementById('date').innerHTML = currentDate;
	//document.getElementById('updated').innerHTML = "Last updated "+currentDateTime.format('hh:nn');
	
}
function loadAutoCompleterCities()
{
	if(cities)
	{
		//don't do anything cities already loaded
	}
	else
	{
		AjaxFlightInformationHelper.getCitiesByAirport(airportCode, fillCities);
	}
	
}

//callback function to store the cities in the cities object retrieved from the server (after calling a remote function AjaxFlightInformationHelper.getCities());
function fillCities(cityList)
{
	cities = cityList;
	//new Autocompleter.Local('routeTextbox', 'routeSuggestList', cities.toArray(), {minChars: 2, fullSearch: true});
			var el = $('searchArrivalFrom');
			var el2 = $('searchDepTo');
			/**
			 * Local
			 */

			var tokens = cities;
			//alert(cities);
			
			var completer1 = new Autocompleter.Local(el, tokens, {
				'minLength': 2,
				'delay': 0,
				'filterTokens': function() {
					var regex = new RegExp('.*' + this.queryValue.escapeRegExp() + '.*', 'i');
					return this.tokens.filter(function(token){
						return (regex.test(token));
					});
				},
				'injectChoice': function(choice) {
					var el = new Element('li').setHTML(this.markQueryValue(choice));
					el.inputValue = choice;
					this.addChoiceEvents(el).injectInside(this.choices);
				}
			});
			
			var completer2 = new Autocompleter.Local(el2, tokens, {
				'minLength': 2,
				'delay': 0,
				'filterTokens': function() {
					var regex = new RegExp('.*' + this.queryValue.escapeRegExp() + '.*', 'i');
					return this.tokens.filter(function(token){
						return (regex.test(token));
					});
				},
				'injectChoice': function(choice) {
					var el2 = new Element('li')
						.setHTML(this.markQueryValue(choice));
					el2.inputValue = choice;
					this.addChoiceEvents(el2).injectInside(this.choices);
				}
			});	
}

//init function for this page.  Any initialization can be done here. 

var MAX_DUMP_DEPTH = 10;

//another debug method to inspect javascript method
function dump(arr,level) {
var dumped_text = "";
if(!level) level = 0;

//The padding given at the beginning of the line.
var level_padding = "";
for(var j=0;j<level+1;j++) level_padding += "    ";

if(typeof(arr) == 'object') { //Array/Hashes/Objects
 for(var item in arr) {
  var value = arr[item];
 
  if(typeof(value) == 'object') { //If it is an array,
   dumped_text += level_padding + "'" + item + "' ...\n";
   dumped_text += dump(value,level+1);
  } else {
   dumped_text += level_padding + "'" + item + "' => \"" + value + "\"\n";
  }
 }
} else { //Stings/Chars/Numbers etc.
 dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
}
return dumped_text;
} 


//attaching the init method to the browser's onload event
function callOnLoad(init)
{
	    if (window.addEventListener)
	    {
	        window.addEventListener("load", init, false);
	    }
	    else if (window.attachEvent)
	    {
	        window.attachEvent("onload", init);
	    }
	    else
	    {
	        window.onload = init;
	    }
}

//calling remote method to get suggested cities list
function updateRouteSuggestList(autocompleter, token)
{
	//AjaxFlightInformationHelper.suggestRoute(token, function(data){ autocompleter.setChoices(data); });
	AjaxFlightInformationHelper.getCitiesByAirport(airportCode, function(data){ autocompleter.setChoices(data); }); 
}

//helper functionf or AutoCompeleter.DWR
function nameValueSelector(tag)
{
	return tag;
}

//Main method that calls remote method to search or load flight information
function callRemoteSearchMethod()
{
	
	//AjaxFlightInformationHelper.getDummyFlightInfo(showFlightInfo);
	
	//AjaxFlightInformationHelper.findFlights(flightType, airportCode, terminalId, flightNumber, route, orderBy, sortDirection, showFlightInfo);
	var flightNumber = "";
	var route = "";
	
	if(flightType == FlightsTypeEnum.arrival)
	{
		//Clear the flight data first
		clearFlightsTable("arrivalFlightsTable");
		
		flightNumber = document.getElementById('arrivalFlightNo').value;
		if(flightNumber == document.getElementById('arrivalFlightNo').title)
			flightNumber = "";
		
		route = document.getElementById('searchArrivalFrom').value;
		if(route == document.getElementById('searchArrivalFrom').title)
			route = "";
		
		if(flightNumber.length>0 && ((flightNumber.length>7) || !flightNumber.match(/[a-zA-Z]+[0-9]*/)))
		{
			
			document.getElementById("arrivalErrorSpan").innerHTML = ERROR_INVALID_FLIGHT_NUMBER;
			return;
		}
		else
		{
			
			document.getElementById("arrivalErrorSpan").innerHTML = "";
		}
	}
	else
	{
		//clear the flight data first
		clearFlightsTable("departureFlightsTable");
		
		flightNumber = document.getElementById('depFlightNo').value;
		if(flightNumber == document.getElementById('depFlightNo').title)
			flightNumber = "";
		
		route = document.getElementById('searchDepTo').value;
		if(route == document.getElementById('searchDepTo').title)
			route = "";
			
		if(flightNumber.length>0 && ((flightNumber.length>7) || !flightNumber.match(/[a-zA-Z]+[0-9]*/)))
		{
			document.getElementById("depErrorSpan").innerHTML = ERROR_INVALID_FLIGHT_NUMBER;
			return;
		}
		else
		{
			document.getElementById("depErrorSpan").innerHTML = "";
		}
	}
	
	if((terminalId==null) || (terminalId == "null"))
	{
		showGif();	
		AjaxFlightInformationHelper.findFlights(flightType, airportCode, "", flightNumber, route, orderBy, sortDirection, showFlightInfo);
	}
	else
	{
		showGif();
		AjaxFlightInformationHelper.findFlights(flightType, airportCode, terminalId, flightNumber, route, orderBy, sortDirection, showFlightInfo);
	}
	
	document.getElementById("arrivalErrorSpan").innerHTML = "";
	document.getElementById("depErrorSpan").innerHTML = "";
}

var getScheduled = function(flight) { return flight.scheduled;}
var getCode = function(flight) {	return flight.code;}
var getRouteString = function(flight) { return flight.routeString;}
var getStatus = function(flight) { return flight.status;}
var getTerminal = function(flight) { return flight.terminal;}
var getTerminalName = function(flight){ return flight.terminalName;}
var getBlank = function(flight) { return " ";} 

function showGif() {
	var busyGif = document.getElementById('busygif');
	busyGif.style.display = 'inline';
	busyGif.style.height = '10pt';
	
}

function hideGif() {
	var busyGif = document.getElementById('busygif');
	busyGif.style.display = 'none';
	busyGif.style.height = '0pt';
}


//toggles the flight table between minimized and maximized states and brings back flight information data if necessary
function toggleCollapseFlightTable()
{	
	showGif();

	flightTableMinimized = !flightTableMinimized;

	if(flights == null)
	{
		callRemoteSearchMethod();
	}
	else
	{
		setTimeout("showFlightInfo(flights);", 10);
	}
	
	return;
	
}

//callback method that is called after flights are retrieved from the server
function showFlightInfo(result)
{
	//console.time("Flight Information Painting");
	
	flights = result;
	//dwr.util.removeAllRows("flightsTable");
    //dwr.util.addRows("flightsTable", flights, [ getScheduled, getCode, getRouteString, getStatus, getTerminalName, getBlank, getBlank ]);
	if(flightType == FlightsTypeEnum.arrival)
	{
		clearFlightsTable("arrivalFlightsTable");
	}
	else
	{
		clearFlightsTable("departureFlightsTable");
	}
	
	//alert("findFlights results: "+flights.length);
	fillFlightsTable(flights);
	//console.timeEnd("Flight Information Painting");
	
	updateDateAndTime();
	//flights[item].scheduled.format('hh:nn'), flights[item].code, flights[item].routeString, flights[item].status, flights[item].terminalName, " ", " ");
	
	hideGif();
}

//helper method to clear the tbody of a table (arrival or departures flight table)
function clearFlightsTable(tablename)
{
	var mytable = document.getElementById(tablename);
	var oldtablebody = mytable.getElementsByTagName("tbody")[0];
	clearTable(oldtablebody);
	//var mytbody = document.createElement("tbody");
	//mytable.replaceChild(mytbody, oldtablebody);
	//oldtablebody.innerHTML = "";
}

function clearTable(tbody) {
        while (tbody.rows.length > 0) {
            tbody.deleteRow(0);
        }
}

//helper method to repaint the flights table (whether it be arrival or departures)
function fillFlightsTable(flights)
{
	var mytable = null;
	var flightsDiv = null;
	if(flightType == FlightsTypeEnum.arrival)
	{
		flightsDiv = document.getElementById("arrivals");
		mytable = document.getElementById("arrivalFlightsTable");
	}
	else
	{
		flightsDiv = document.getElementById("departures");
		mytable = document.getElementById("departureFlightsTable");
	}
	mytablebody = document.createElement("tbody");
	
	var flightsToShow = 0;
	var showMoreRows = false;
	var showLessRows = false;
	var flightNum = flights.length;
	if(flightTableMinimized)
	{
		
		if(flightNum > 0 && flightNum <= 3)
			flightsToShow = flights.length;
		else
		{
			flightsToShow = 3;
			showMoreRows = true;
		}
		flightsDiv.style.height = "";
		flightsDiv.style.overflow = "hidden";
		flightsDiv.style.overflowX = "hidden";
	}
	else
	{
		if(flightNum>=3)
		{
			showLessRows = true;
		}
		flightsToShow = flights.length;
		if(flightNum>=0 && flightNum <=10)
		{
		
			//unscrolled version
			flightsDiv.style.height = "";
			flightsDiv.style.overflow = "hidden";
			flightsDiv.style.overflowX = "hidden";
		}
		else
		{
			flightsDiv.style.height = "220px";
			flightsDiv.style.overflow = "scroll";
			flightsDiv.style.overflowX = "hidden";
			//scrollable version after 10 rows.
		}
	}
	
	var oldDate = null;
	var newDate = null;
	oldtablebody = mytable.getElementsByTagName("tbody")[0];
	
	
	if(flights.length == 0)
	{
		//addDateRow(mytablebody, 0, "No Matching Results.");
		if(flightType == FlightsTypeEnum.arrival)
			addDateRow(mytablebody, 0, MSG_NO_MATCHING_ARRIVALS);
		else
			addDateRow(mytablebody, 0, MSG_NO_MATCHING_DEPS);
	}
	
	
	
	for(var item=0;item<flightsToShow;item++)
	{
		if(flights[item]!=null)
		{
			newDate = flights[item].scheduled.format('ddd dd mmmm yyyy');
			
			if((oldDate == null) && (!(newDate == currentDateStr)))
			{
				addDateRow(mytablebody, item, newDate);
			}
			if((oldDate!=null)&&(oldDate!=newDate))
			{
					addDateRow(mytablebody, item, newDate);
			}
			//if(((oldDate == null) || (newDate != oldDate)) && !(newDate == currentDateStr))
			//{
			//	addDateRow(mytablebody, item, newDate);
			//}
			oldDate = flights[item].scheduled.format('ddd dd mmmm yyyy');
			
			var tmpStatus;
			var tmpStatusTime;
			if(flightType == FlightsTypeEnum.arrival)
			{	
				tmpStatus = flights[item].status;
				tmpStatusTime = flights[item].statusTime;
				if(flights[item].status == null || flights[item].status == "null")
				{
					tmpStatus = "";
					
						
				}
				else
				{
					if(flights[item].statusTime == null || flights[item].statusTime == "null")
					{
						tmpStatusTime = "";
					}
					else
					{
						tmpStatusTime = flights[item].statusTime;
					}
					tmpStatus = tmpStatus+" "+tmpStatusTime;
					
					//tmpStatus = flights[item].status+" "+tmpStatusTime;
				}
				if(!hideTerminalColumn)
					addFlightInfoRow(mytablebody, item, flights[item].displayTime, flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode);
				else
					addFlightInfoRow(mytablebody, item, flights[item].displayTime, flights[item].code, flights[item].routeString, tmpStatus, "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
					
				//addFlightInfoRow(mytablebody, item, flights[item].scheduled.format('hh:nn'), flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode);
				//addFlightInfoRowTest(mytablebody, item, flights[item].scheduled.format('hh:nn'), flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode, " ");
				
			}
			else
			{
				tmpStatus = flights[item].status;
				if(tmpStatus == "CANCELLED")
					tmpStatus = "PLEASE CONTACT YOUR AIRLINE";
				else
				{
					if(flights[item].status == null || flights[item].status == "null")
					{
						tmpStatus = "";
					}
					else
					{
						if(flights[item].statusTime == null || flights[item].statusTime == "null")
						{
							tmpStatusTime = "";
						}
						else
						{
							tmpStatusTime = flights[item].statusTime;
						}
						tmpStatus = tmpStatus+" "+tmpStatusTime;
						
						//tmpStatus = flights[item].status+" "+tmpStatusTime;
					}
				}
				if(!hideTerminalColumn)
					addFlightInfoRow(mytablebody, item, flights[item].displayTime, flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode);
				else
					addFlightInfoRow(mytablebody, item, flights[item].displayTime, flights[item].code, flights[item].routeString, tmpStatus, "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
					
				//addFlightInfoRow(mytablebody, item, flights[item].scheduled.format('hh:nn'), flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode);
				//addFlightInfoRowTest(mytablebody, item, flights[item].scheduled.format('hh:nn'), flights[item].code, flights[item].routeString, tmpStatus, flights[item].terminalCode, " ");
				
			}		
		}
		
	}
	
	mytable.replaceChild(mytablebody, oldtablebody);
	
	if(flightTableMinimized&&showMoreRows)
	{
		document.getElementById("allFlights").innerHTML = '<a class="normal" href="javascript:toggleCollapseFlightTable();">See all flights</a>';
		
	}
	else if(flightTableMinimized&&!showMoreRows)
	{
		document.getElementById("allFlights").innerHTML = '';
	}
	else if(!flightTableMinimized&&showLessRows){	
		
		document.getElementById("allFlights").innerHTML = '<a class="close" href="javascript:toggleCollapseFlightTable();">Minimise</a>';
	}
	else if(!flightTableMinimized&&!showLessRows)
	{
		document.getElementById("allFlights").innerHTML = '';
	}
	
	
}

function addEmptyColumn(currentRow, elementtype) {
	
	var currentCell = document.createElement(elementtype);
	currentCell.setAttribute("class", "empty");
	currentCell.className = "empty";
	currentRow.appendChild(currentCell);
}

function addFlightInfoRow(mytbody, index)
{
	//var mytable = document.getElementById(tableId);
	//var mytablebody = document.getElementsByTagName("tbody");
	currentRow = document.createElement("tr");
	if(index%2==0)
	{
		currentRow.setAttribute("class","altrow");
		currentRow.setAttribute("className","altrow"); //this is so it works on IE
	}
	
	// add empty column
	addEmptyColumn(currentRow, "td");
	
	var colNum = 0;	
	for(var i=2;i<arguments.length; i++)
	{
		var text = arguments[i];
		colNum = i-2;
		currentCell = document.createElement("td");//document.createElement("td");
		switch(colNum)
		{
			case 0:
				currentCell.setAttribute("class", "sched");
				currentCell.className = "sched";
				break;
			case 1:
				currentCell.setAttribute("class", "no");
				currentCell.className = "no";
				break;
			case 2:
				currentCell.setAttribute("class", "from");
				currentCell.className = "from";
				break;
			case 3:
				currentCell.setAttribute("class", "status");
				currentCell.className = "status";
				break;
			case 4:
				currentCell.setAttribute("class", "terminal");
				currentCell.className = "terminal";
				text = "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + text;
				break;
//			case 5:
//				currentCell.setAttribute("class", "sms");
//				currentCell.className = "sms";
//				break;
			
		}
		
		if(text==null)
			text = "";
		//currentText = document.createTextNode(text);
		currentCell.innerHTML = text;
		currentRow.appendChild(currentCell);
		
		
	}
	
	// add empty column
	addEmptyColumn(currentRow, "td");
	
	mytbody.appendChild(currentRow);
	
}

function addFlightInfoRowTest(mytbody, index)
{
	//currentRow = document.createElement("tr");
	
	currentRow = mytbody.insertRow(mytbody.rows.length);
	if(currentRow == null || currentRow == 'null')
	{
		currentRow = mytbody.insertRow();
	}
	
	if(index%2==0)
	{
		currentRow.className = "altrow";
	}
	var colNum = 0;	
	for(var i=2;i<arguments.length; i++)
	{
		var text = arguments[i];
		colNum = i-2;
		//currentCell = document.createElement("td");//document.createElement("td");
		currentCell = currentRow.insertCell(colNum);
		switch(colNum)
		{
			case 0:
				currentCell.className = "sched";
				break;
			case 1:
				currentCell.className = "no";
				break;
			case 2:
				currentCell.className = "from";
				break;
			case 3:
				currentCell.className = "status";
				break;
			case 4:
				currentCell.className = "terminal";
				break;
//			case 5:
//				currentCell.className = "sms";
//				break;
		}
		
		if(text==null)
			text = "";
		
		currentCell.innerHTML = text;
		
	}
	
}

function addDateRow(mytbody)
{	
	
	currentRow = document.createElement("tr");
	
	addEmptyColumn(currentRow, "th");
	
	currentRowHeader = document.createElement("th");
	currentRowHeader.setAttribute("colSpan", "5");
	currentRowHeader.setAttribute("id", "subHeader");
		
	//currentText = document.createTextNode(arguments[2]);
	//currentRowHeader.appendChild(currentText);
	currentRowHeader.innerHTML = arguments[2];
	
	currentRow.appendChild(currentRowHeader);
	
	addEmptyColumn(currentRow, "th");
	
	mytbody.appendChild(currentRow);
	
}

function getDepartureFlights()
{
	timeSortDirection = 1;
	flightSortDirection = -1;
	routeSortDirecton = -1;
	statusSortDirection = -1;
	terminalSortDirection = -1;
	sortDirection = timeSortDirection;
	orderBy = OrderByEnum.time;
	
	removeColumnArrows();
	renderColumnArrow(sortDirection, "depSchedCol");
	
	flightType = FlightsTypeEnum.departure;
	callRemoteSearchMethod();
}

function getArrivalFlights()
{
	timeSortDirection = 1;
	flightSortDirection = -1;
	routeSortDirecton = -1;
	statusSortDirection = -1;
	terminalSortDirection = -1;
	sortDirection = timeSortDirection;
	orderBy = OrderByEnum.time;
	removeColumnArrows();
	renderColumnArrow(sortDirection, "arrivalSchedCol");
	
	flightType = FlightsTypeEnum.arrival;
	callRemoteSearchMethod();
}

function renderColumnArrow(sortDirection, colName)
{
	if(sortDirection == 1)
	{
		document.getElementById(colName).className = "sortUp";
		
	}
	else
	{
		document.getElementById(colName).className = "sortDown";
		
	}
}

function removeColumnArrows()
{
	
	if(flightType == FlightsTypeEnum.arrival)
	{
		document.getElementById("arrivalSchedCol").className = "";
		document.getElementById("arrivalNoCol").className = "";
		document.getElementById("arrivalFromCol").className = "";
		document.getElementById("arrivalStatusCol").className = "";
		document.getElementById("arrivalTerminalCol").className = "";
	}
	else
	{
		document.getElementById("depSchedCol").className = "";
		document.getElementById("depNoCol").className = "";
		document.getElementById("depFromCol").className = "";
		document.getElementById("depStatusCol").className = "";
		document.getElementById("depTerminalCol").className = "";
	}
	
}

function sortBySchedule(a)
{
	
	orderBy = OrderByEnum.time;
	timeSortDirection = -1*(timeSortDirection);
	sortDirection = timeSortDirection;
	removeColumnArrows();
	flightSortDirection = -1;
	routeSortDirecton = -1;
	statusSortDirection = -1;
	terminalSortDirection = -1;
	if(flightType == FlightsTypeEnum.arrival)
		renderColumnArrow(sortDirection, "arrivalSchedCol");
	else
		renderColumnArrow(sortDirection, "depSchedCol");
	callRemoteSearchMethod();
}

function sortByRoute(a)
{
	orderBy = OrderByEnum.route;
	routeSortDirecton = -1*(routeSortDirecton);
	sortDirection = routeSortDirecton;
	removeColumnArrows();
	timeSortDirection = -1;
	flightSortDirection = -1;
	statusSortDirection = -1;
	terminalSortDirection = -1;
	if(flightType == FlightsTypeEnum.arrival)
		renderColumnArrow(sortDirection, "arrivalFromCol");
	else
		renderColumnArrow(sortDirection, "depFromCol");
	callRemoteSearchMethod();
}

function sortByStatus(a)
{
	orderBy = OrderByEnum.status;
	statusSortDirection = -1*(statusSortDirection);
	sortDirection = statusSortDirection;
	removeColumnArrows();
	timeSortDirection = -1;
	flightSortDirection = -1;
	routeSortDirection = -1;
	terminalSortDirection = -1;
	if(flightType == FlightsTypeEnum.arrival)
		renderColumnArrow(sortDirection, "arrivalStatusCol");
	else
		renderColumnArrow(sortDirection, "depStatusCol");
	callRemoteSearchMethod();
}

function sortByFlight(a)
{
	orderBy = OrderByEnum.flight;
	flightSortDirection = -1*(flightSortDirection);
	sortDirection = flightSortDirection;
	removeColumnArrows();
	timeSortDirection = -1;
	routeSortDirecton = -1;
	statusSortDirection = -1;
	terminalSortDirection = -1;
	if(flightType == FlightsTypeEnum.arrival)
		renderColumnArrow(sortDirection, "arrivalNoCol");
	else
		renderColumnArrow(sortDirection, "depNoCol");
	callRemoteSearchMethod();
}

function sortByTerminal(a)
{
	orderBy = OrderByEnum.terminal;
	terminalSortDirection = -1*(terminalSortDirection);
	sortDirection = terminalSortDirection;
	removeColumnArrows();
	timeSortDirection = -1;
	routeSortDirecton = -1;
	statusSortDirection = -1;
	
	if(flightType == FlightsTypeEnum.arrival)
		renderColumnArrow(sortDirection, "arrivalTerminalCol");
	else
		renderColumnArrow(sortDirection, "depTerminalCol");
	callRemoteSearchMethod();
}

function onRouteEnter(e)
{
	var characterCode = null; //literal character code will be stored in this variable

	if(e && e.which){ //if which property of event object is supported (NN4)
		e = e;
		characterCode = e.which; //character code is contained in NN4's which property
	}
	else{
		e = e;
		characterCode = e.keyCode; //character code is contained in IE's keyCode property
	}
	
	if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
		callRemoteSearchMethod(); //submit the form
		return false;
	}
	else{
		return true;
	}
}

function onArrivalsQuery(e)
{
	var characterCode = null; //literal character code will be stored in this variable

	if(e && e.which){ //if which property of event object is supported (NN4)
		e = e;
		characterCode = e.which; //character code is contained in NN4's which property
	}
	else{
		e = e;
		characterCode = e.keyCode; //character code is contained in IE's keyCode property
	}
	
	if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
		callRemoteArrivalsSearchMethod(); //submit the form
		return false;
	}
	else{
		return true;
	}
}

function onDeparturesQuery(e)
{
	var characterCode = null; //literal character code will be stored in this variable

	if(e && e.which){ //if which property of event object is supported (NN4)
		e = e;
		characterCode = e.which; //character code is contained in NN4's which property
	}
	else{
		e = event;
		characterCode = e.keyCode; //character code is contained in IE's keyCode property
	}
	
	if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
		callRemoteDeparturesSearchMethod(); //submit the form
		return false;
	}
	else{
		return true;
	}
	
}

function callRemoteArrivalsSearchMethod()
{
	
	var flightNumber = document.getElementById('arrivalFlightNo').value;
	var route = document.getElementById('searchArrivalFrom').value;
	var fType = FlightsTypeEnum.arrival;
	if((terminalId==null) || (terminalId == "null"))
		AjaxFlightInformationHelper.findFlights(fType, airportCode, "", flightNumber, route, orderBy, sortDirection, showFlightInfo);
	else
		AjaxFlightInformationHelper.findFlights(fType, airportCode, terminalId, flightNumber, route, orderBy, sortDirection, showFlightInfo);
	

}

function callRemoteDeparturesSearchMethod()
{
	var flightNumber = document.getElementById('depFlightNo').value;
	var route = document.getElementById('searchDepTo').value;
	var fType = FlightsTypeEnum.departure;
	if((terminalId==null) || (terminalId == "null"))
		AjaxFlightInformationHelper.findFlights(fType, airportCode, "", flightNumber, route, orderBy, sortDirection, showFlightInfo);
	else
		AjaxFlightInformationHelper.findFlights(fType, airportCode, terminalId, flightNumber, route, orderBy, sortDirection, showFlightInfo);

}