/*
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 */
var useBSNns;

if (useBSNns){
	if (typeof(bsn) == "undefined") bsn = {};
	_bsn = bsn;
} else _bsn = this;

if (typeof(_bsn.Autosuggest) == "undefined") _bsn.Autosuggest = {};

_bsn.AutoSuggest = function (id, param)
{
	// no DOM - give up!
	if (!document.getElementById) return false;
	// get field via DOM
	this.fld = _bsn.DOM.gE(id);
	if (!this.fld) return false;
	
	// init variables
	this.sInput 		= '';
	this.nInputChars 	= 0;
	this.aSuggestions 	= [];
	this.iHighlighted 	= 0;

	// parameters object
	this.oP = (param) ? param : {};
	// defaults	
	var def = {minchars:1, meth:"get", varname:"input", className:"autosuggest", timeout:2500, delay:80, offsety:-5, shownoresults: true, noresults: "No results!", maxheight: 250, cache: true};
	for (k in def)
		if (typeof(this.oP[k]) != typeof(def[k]))	this.oP[k] = def[k];
	
	// set keyup handler for field and prevent autocomplete from client
	var p = this;
	
	// NOTE: not using addEventListener because UpArrow fired twice in Safari
	//_bsn.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
	this.fld.onkeydown 	= function(ev){ return p.onkeyDown(ev); }
	this.fld.onkeyup 		= function(ev){ return p.onKeyUp(ev); }
	this.fld.setAttribute("autocomplete","off");
}

_bsn.AutoSuggest.prototype.onkeyDown = function(ev)
{
	var key = (window.event) ? window.event.keyCode : ev.keyCode;

	// set responses to keydown events in the field
	// this allows the user to use the arrow keys to scroll through the results
	// ESCAPE clears the list
	// TAB sets the current highlighted value
	var RETURN = 13;
	var TAB = 9;
	var ESC = 27;
	var bubble = true;

	switch(key)
	{
		case RETURN:
			this.setHighlightedValue();
			bubble = false;
			break;
			
		case TAB:
			this.setHighlightedValue();
			event.keyCode = 9;
			bubble = false;
			break;

		case ESC:
			this.clearSuggestions();
			break;
	}
	return bubble;
}

_bsn.AutoSuggest.prototype.onKeyUp = function(ev)
{
	var key = (window.event) ? window.event.keyCode : ev.keyCode;

	// set responses to keydown events in the field
	// this allows the user to use the arrow keys to scroll through the results
	// ESCAPE clears the list
	// TAB sets the current highlighted value
	var ARRUP = 38;
	var ARRDN = 40;
	var bubble = true;

	switch(key)
	{
		case ARRUP:
			this.changeHighlight(key);
			bubble = false;
			break;

		case ARRDN:
			this.changeHighlight(key);
			bubble = false;
			break;
		
		default:
			this.getSuggestions(this.fld.value);
	}
	return bubble;
}

_bsn.AutoSuggest.prototype.getSuggestions = function (val)
{
	// if input stays the same, do nothing
	if (val == this.sInput) return false;
	
	// input length is less than the min required to trigger a request
	// reset input string - do nothing
	if (val.length < this.oP.minchars)
	{
		this.sInput = "";
		return false;
	}
	
	// if caching enabled, and user is typing (ie. length of input is increasing)
	// filter results out of aSuggestions from last request
	if (val.length>this.nInputChars && this.aSuggestions.length && this.oP.cache)
	{
		var arr = [];
		for (var i=0;i<this.aSuggestions.length;i++)
		{
			if (this.aSuggestions[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
				arr.push( this.aSuggestions[i] );
		}
		
		this.sInput = val;
		this.nInputChars = val.length;
		this.aSuggestions = arr;
		this.createList(this.aSuggestions);

		return false;
	}else // do new request
	{
		this.sInput = val;
		this.nInputChars = val.length;

		var pointer = this;
		clearTimeout(this.ajID);
		this.ajID = setTimeout( function() { pointer.doAjaxRequest() }, this.oP.delay );
	}
	return false;
}

_bsn.AutoSuggest.prototype.doAjaxRequest = function ()
{
	var pointer = this;
	
	// create ajax request
	if (typeof(this.oP.script) == "function")
		 var url = this.oP.script(escape(this.fld.value));
	else var url = this.oP.script+this.oP.varname+"="+escape(this.fld.value);
	
	if (!url) return false;
	
	var meth = this.oP.meth;
	var onSuccessFunc = function (req) { pointer.setSuggestions(req) };
	var onErrorFunc = function (status) { alert("AJAX error: "+status); };

	var myAjax = new _bsn.Ajax();
	myAjax.makeRequest( url, meth, onSuccessFunc, onErrorFunc );
}

_bsn.AutoSuggest.prototype.setSuggestions = function (req)
{
	this.aSuggestions = [];
	
	if (this.oP.json)
	{
		var jsondata = eval('(' + req.responseText + ')');
		
		for (var i=0;i<jsondata.results.length;i++)
		{
			this.aSuggestions.push(  {	'id':jsondata.results[i].id,
										'value':jsondata.results[i].value,
										'info':jsondata.results[i].info,
										'aptcode':jsondata.results[i].aptcode,
										'geonameid':jsondata.results[i].geonameid }  );
		}
	}
	else
	{
		var xml = req.responseXML;
		// traverse xml
		var results = xml.getElementsByTagName('results')[0].childNodes;

		for (var i=0;i<results.length;i++)
		{
			if (results[i].hasChildNodes())
				this.aSuggestions.push(  { 	'id':results[i].getAttribute('id'), 
											'value':results[i].childNodes[0].nodeValue,
											'info':results[i].getAttribute('info'),
											'aptcode':results[i].getAttribute('aptcode'), 
											'geonameid':results[i].getAttribute('geonameid') }  );
		}
	}
	this.idAs = "as_" + this.fld.id;
	this.createList(this.aSuggestions);
}

_bsn.AutoSuggest.prototype.createList = function(arr)
{
	var pointer = this;
	
	// get rid of old list  and clear the list removal timeout
	_bsn.DOM.remE(this.idAs);
	this.killTimeout();
	// if no results, and shownoresults is false, do nothing
	if (arr.length < 3  && !this.oP.shownoresults) this.clearSuggestions();
	if (arr.length == 0 && !this.oP.shownoresults) return false;
	// create holding div
	var div = _bsn.DOM.cE("div", {id:this.idAs, className:this.oP.className});	
	
	var hcorner = _bsn.DOM.cE("div", {className:"as_corner"});
	var hbar = _bsn.DOM.cE("div", {className:"as_bar"});
	var header = _bsn.DOM.cE("div", {className:"as_header"});
	header.appendChild(hcorner);
	header.appendChild(hbar);
	div.appendChild(header);

	// create and populate ul
	var ul = _bsn.DOM.cE("ul", {id:"as_ul"});
	
	var lastElement = 'city';
	
	// loop throught arr of suggestions creating an LI element for each suggestion
	for (var i=0;i<arr.length;i++)
	{
		// format output with the input enclosed in a EM element (as HTML, not DOM)
		var val = arr[i].value;
		var st = val.toLowerCase().indexOf( this.sInput.toLowerCase() );
		var output = val.substring(0,st) + "<em>" + val.substring(st, st+this.sInput.length) + "</em>" + val.substring(st+this.sInput.length);
		
		// HEADLINES BEGIN //
		if ((arr[i].info != "" && lastElement == 'city') || (i == 0 && arr[i].info == ""))
		{
			var span = _bsn.DOM.cE(  "div", {}  );
		}		
		if (i == 0 && arr[i].info == "" && arr[i].geonameid != "")
		{
			temp = (lang == 'de') ? 'Städte' : ' Cities';
			var hla = _bsn.DOM.cE("big", {}, _bsn.DOM.cE("strong", {},temp));
			span.appendChild(hla);
		}		
		if (arr[i].info != "" && lastElement == 'city')
		{
			var br	= _bsn.DOM.cE("br", {});
			span.appendChild(br);
			
			temp = (lang == 'de') ? 'Flughäfen' : ' Airports';
			var hla = _bsn.DOM.cE("big", {}, _bsn.DOM.cE("strong", {},temp));
			span.appendChild(hla);
		}
		if ((arr[i].info != "" && lastElement == 'city') || (i == 0 && arr[i].info == ""))
		{
			ul.appendChild( span );
		}
		// HEADLINES END //

		var span = _bsn.DOM.cE("span", {}, output, true);
		if (arr[i].info != "")
		{
			var br			= _bsn.DOM.cE("br", {});
			span.appendChild(br);
			var small		= _bsn.DOM.cE("small", {}, arr[i].info);
			span.appendChild(small);
			
			lastElement = 'air';
		}
		else lastElement = 'city';
		
		var a = _bsn.DOM.cE("a", { href:"#" });
		
		a.appendChild(span);

		a.name = i+1;
		a.onclick = function () { pointer.setHighlightedValue(); return false; }
		a.onmouseover = function () { pointer.setHighlight(this.name); }
		
		var li 	= _bsn.DOM.cE(  "li", {id:"suggest"+(i+1)}, a  );
		ul.appendChild( li );
	}
	// no results
	if (arr.length == 0 && this.oP.shownoresults)
	{
		var li = _bsn.DOM.cE(  "li", {className:"as_warning"}, this.oP.noresults  );
		ul.appendChild( li );
	}
	div.appendChild( ul );
	
	var fcorner = _bsn.DOM.cE("div", {className:"as_corner"});
	var fbar = _bsn.DOM.cE("div", {className:"as_bar"});
	var footer = _bsn.DOM.cE("div", {className:"as_footer"});
	footer.appendChild(fcorner);
	footer.appendChild(fbar);
	div.appendChild(footer);
	
	// get position of target textfield position holding div below it set width of holding div to width of field
	var pos = _bsn.DOM.getPos(this.fld);
	
	div.style.left 		= pos.x + "px";
	div.style.top 		= ( pos.y + this.fld.offsetHeight + this.oP.offsety ) + "px";
	div.style.width 	= this.fld.offsetWidth + "px";
	
	// set mouseover functions for div, when mouse pointer leaves div, set a timeout to remove the list after
	// an interval when mouse enters div, kill the timeout so the list won't be removed
	div.onmouseover 	= function(){ pointer.killTimeout() }
	div.onmouseout 		= function(){ pointer.resetTimeout() }

	// add DIV to document
	var iframeShim = document.getElementById("hvrShm");
	iframeShim.style.left = div.style.left;
	
	var neuetoppos=parseInt(div.style.top)+5;
	iframeShim.style.top = neuetoppos + "px";
	
	document.getElementsByTagName("body")[0].appendChild(div);
	iframeShim.style.width = div.offsetWidth + "px";
	var neueheight=parseInt(div.offsetHeight)-10;
	iframeShim.style.height = neueheight + "px";		
	iframeShim.style.visibility = "visible";
	iframeShim.style.display = "block";
	div.style.zIndex=3000;
	
	// currently no item is highlighted
	this.iHighlighted = 0;
	// remove list after an interval
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
}

_bsn.AutoSuggest.prototype.changeHighlight = function(key)
{	
	var list = _bsn.DOM.gE("as_ul");
	if (!list) return false;
	var n;

	if 		(key == 40) n = this.iHighlighted + 1;
	else if (key == 38) n = this.iHighlighted - 1;
	
	if (n > list.childNodes.length) n = list.childNodes.length;
	if (n < 1) n = 1;
	
	this.setHighlight(n);
}

_bsn.AutoSuggest.prototype.setHighlight = function(n)
{
	var list = _bsn.DOM.gE("as_ul");
	if (!list) return false;
	
	if (this.iHighlighted > 0) this.clearHighlight();
	this.iHighlighted = Number(n);
	
	document.getElementById('suggest'+n).className = "as_highlight";
	this.killTimeout();
}

_bsn.AutoSuggest.prototype.clearHighlight = function()
{
	var list = _bsn.DOM.gE("as_ul");
	for (i=0; i<list.childNodes.length; i++)
	{
		list.childNodes[i].className = "";
	}
}

_bsn.AutoSuggest.prototype.setHighlightedValue = function ()
{
	if (this.iHighlighted)
	{
		this.sInput = this.fld.value = this.aSuggestions[ this.iHighlighted-1 ].value;
		
		// move cursor to end of input (safari)
		this.fld.focus();
		if (this.fld.selectionStart) this.fld.setSelectionRange(this.sInput.length, this.sInput.length);

		this.clearSuggestions();

		if (this.aSuggestions[ this.iHighlighted-1 ].geonameid != '')
		{
			if (this.fld.id == 'pickUpt' || this.fld.id == 'pickUpCityName')
			{
				document.sf.pickUpGeonameid.value = this.aSuggestions[this.iHighlighted-1].geonameid;
				document.sf.pickUpAptCode.value = '';
			}
			else if (this.fld.id == 'dropOfft' || this.fld.id == 'dropOffCityName')
			{
				document.sf.dropOffGeonameid.value = this.aSuggestions[this.iHighlighted-1].geonameid;
				document.sf.dropOffAptCode.value = '';
			}
			else
			{
				document.getElementById('geo_'+(this.fld.id)).value = this.aSuggestions[this.iHighlighted-1].geonameid;
			}
		}
		if (this.aSuggestions[ this.iHighlighted-1 ].aptcode != '')
		{
			if (this.fld.id == 'pickUpt')
			{
				document.sf.pickUpAptCode.value = this.aSuggestions[this.iHighlighted-1].aptcode;
				document.sf.pickUpGeonameid.value = '';
			}
			if (this.fld.id == 'dropOfft')
			{
				document.sf.dropOffAptCode.value = this.aSuggestions[this.iHighlighted-1].aptcode;
				document.sf.dropOffGeonameid.value = '';
			}
		}

		// pass selected object to callback function, if exists
		if (typeof(this.oP.callback) == "function") this.oP.callback( this.aSuggestions[this.iHighlighted-1] );
	}
}

_bsn.AutoSuggest.prototype.killTimeout = function()
{
	clearTimeout(this.toID);
}

_bsn.AutoSuggest.prototype.resetTimeout = function()
{
	clearTimeout(this.toID);
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, 1000);
}

_bsn.AutoSuggest.prototype.clearSuggestions = function ()
{
	this.killTimeout();
	var ele = _bsn.DOM.gE(this.idAs);
	var pointer = this;
	if (ele)
	{
		var fade = new _bsn.Fader(ele,1,0,100,function () { _bsn.DOM.remE(pointer.idAs) });
	}
	var iframeShim = document.getElementById("hvrShm");
	iframeShim.style.visibility = "hidden";
}

// AJAX PROTOTYPE _____________________________________________
if (typeof(_bsn.Ajax) == "undefined") _bsn.Ajax = {}

_bsn.Ajax = function ()
{
	this.req = {};
	this.isIE = false;
}

_bsn.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr)
{
	if (meth != "POST") meth = "GET";
	this.onComplete = onComp;
	this.onError = onErr;
	
	var pointer = this;
	
	// branch for native XMLHttpRequest object
	if (window.XMLHttpRequest)
	{
		this.req = new XMLHttpRequest();
		this.req.onreadystatechange = function () { pointer.processReqChange() };
		this.req.open("GET", url, true); //
		this.req.send(null);
	// branch for IE/Windows ActiveX version
	}
	else if (window.ActiveXObject)
	{
		this.req = new ActiveXObject("Microsoft.XMLHTTP");
		if (this.req)
		{
			this.req.onreadystatechange = function () { pointer.processReqChange() };
			this.req.open(meth, url, true);
			this.req.send();
		}
	}
}

_bsn.Ajax.prototype.processReqChange = function()
{
	// only if req shows "loaded"
	if (this.req.readyState == 4) {
		// only if "OK"
		if (this.req.status == 200) this.onComplete( this.req );
		else this.onError( this.req.status );
	}
}

// DOM PROTOTYPE _____________________________________________
if (typeof(_bsn.DOM) == "undefined") _bsn.DOM = {}

/* create element */
_bsn.DOM.cE = function ( type, attr, cont, html )
{
	var ne = document.createElement( type );
	if (!ne) return false;
		
	for (var a in attr) ne[a] = attr[a];
		
	if (typeof(cont) == "string" && !html) ne.appendChild( document.createTextNode(cont) );
	else if (typeof(cont) == "string" && html) ne.innerHTML = cont;
	else if (typeof(cont) == "object") ne.appendChild( cont );

	return ne;
}

/* get element */
_bsn.DOM.gE = function ( e )
{
	if (typeof(e) == "undefined") return false;
	else if (typeof(e) == "string")
	{
		var re = document.getElementById( e );
		if (!re) return false;
		else if (typeof(re.appendChild) != "undefined" ) return re;
		else return false;
	}
	else if (typeof(e.appendChild) != "undefined") return e;
	else return false;
}

/* remove element */
_bsn.DOM.remE = function ( ele )
{
	var e = this.gE(ele);
	
	if (!e)	return false;
	else if (e.parentNode.removeChild(e)) return true;
	else return false;
}

/* get position */
_bsn.DOM.getPos = function ( e )
{
	var e = this.gE(e);
	var obj = e;

	var curleft = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curleft += obj.offsetLeft;
			obj = obj.offsetParent;
		}
	}
	else if (obj.x)	curleft += obj.x;
	
	var obj = e;
	
	var curtop = 0;
	if (obj.offsetParent)
	{
		while (obj.offsetParent)
		{
			curtop += obj.offsetTop;
			obj = obj.offsetParent;
		}
	}
	else if (obj.y)	curtop += obj.y;

	return {x:curleft, y:curtop};
}

// FADER PROTOTYPE _____________________________________________
if (typeof(_bsn.Fader) == "undefined") _bsn.Fader = {}

_bsn.Fader = function (ele, from, to, fadetime, callback)
{	
	if (!ele) return false;
	this.ele = ele;
	this.from = from;
	this.to = to;
	this.callback = callback;
	this.nDur = fadetime;
	this.nInt = 50;
	this.nTime = 0;
	
	var p = this;
	this.nID = setInterval(function() { p._fade() }, this.nInt);
}

_bsn.Fader.prototype._fade = function()
{
	this.nTime += this.nInt;
	var ieop = Math.round( this._tween(this.nTime, this.from, this.to, this.nDur) * 100 );
	var op = ieop / 100;
	
	if (this.ele.filters) // internet explorer
	{
		try
		{
			this.ele.filters.item("DXImageTransform.Microsoft.Alpha").opacity = ieop;
		} catch (e) { 
			// If it is not set initially, the browser will throw an error. This will set it if it is not set yet.
			this.ele.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ieop+')';
		}
	}
	else this.ele.style.opacity = op; // other browsers
	
	if (this.nTime == this.nDur)
	{
		clearInterval( this.nID );
		if (this.callback != undefined) this.callback();
	}
}

_bsn.Fader.prototype._tween = function(t,b,c,d)
{
	return b + ( (c-b) * (t/d) );
}