/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 *              2.1.1 - 2007-04-13
 *              2.1.2 - 2007-07-07
 *              2.1.3 - 2007-07-19
 *
 */

useBSNns = true;

if (typeof(bsn) == "undefined")
	_b = bsn = {};

if (typeof(_b.Autosuggest) == "undefined")
	_b.Autosuggest = {};
else
	alert("Autosuggest is already set!");

_b.AutoSuggest = function (id, param)
{
	// no DOM - give up!
	//
	if (!document.getElementById)
		return 0;
	
	
	
	
	// get field via DOM
	//
	this.fld = _b.DOM.gE(id);

	if (!this.fld)
		return 0;
	
	
	
	
	// init variables
	//
	this.sInp 	= "";
	this.nInpC 	= 0;
	this.aSug 	= [];
	this.iHigh 	= 0;
	
	
	
	
	// parameters object
	//
	this.oP = param ? param : {};
	
	// defaults	
	//
	var k, def = {minchars:1, meth:"get", varname:"input", className:"autosuggest", timeout:2500, delay:500, offsety:-5, shownoresults: true, noresults: "No results!", maxheight: 250, cache: true, maxentries: 25};
	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
	//_b.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
	
	this.fld.onkeypress 	= function(ev){ return p.onKeyPress(ev); };
	this.fld.onkeyup 		= function(ev){ return p.onKeyUp(ev); };
	
	this.fld.setAttribute("autocomplete","off");
};

_b.AutoSuggest.prototype.onKeyPress = 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 = 1;

	switch(key)
	{
		case RETURN:
			this.setHighlightedValue();
			bubble = 0;

            if (!this.iHigh){
                this.form.submit();
            }

            return false;
			break;

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

	return bubble;
};

_b.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 = 1;

	switch(key)
	{


		case ARRUP:
			this.changeHighlight(key);
			bubble = 0;
			break;


		case ARRDN:
			this.changeHighlight(key);
			bubble = 0;
			break;
		
		
		default:
			this.getSuggestions(this.fld.value);
	}

	return bubble;
	

};

_b.AutoSuggest.prototype.getSuggestions = function (val)
{
	
	// if input stays the same, do nothing
	//
	if (val == this.sInp)
		return 0;
	
	
	// kill list
	//
/*
	_b.DOM.remE(this.idAs);

*/	
	
	this.sInp = val;


	// input length is less than the min required to trigger a request
	// do nothing
	//
	if (val.length < this.oP.minchars) {
		this.aSug = [];
		this.nInpC = val.length;
		return 0;
	}




	var ol = this.nInpC; // old length
	this.nInpC = val.length ? val.length : 0;



	// if caching enabled, and user is typing (ie. length of input is increasing)
	// filter results out of aSuggestions from last request
	//
	var l = this.aSug.length;
	if (this.nInpC > ol && l && l<this.oP.maxentries && this.oP.cache) {
		var arr = [];
		for (var i=0;i<l;i++) {
			if (this.aSug[i].value.substr(0,val.length).toLowerCase() == val.toLowerCase())
				arr.push( this.aSug[i] );
		}
		this.aSug = arr;
		this.createList(this.aSug);
		return false;
	} else {
		// do new request
		var pointer = this;
		var input = this.sInp;
		clearTimeout(this.ajID);
		this.ajID = setTimeout( function() { pointer.doAjaxRequest(input) }, this.oP.delay );
	}

	return false;
};

_b.AutoSuggest.prototype.doAjaxRequest = function (input)
{
	// check that saved input is still the value of the field
	//
	if (input != this.fld.value)
		return false;
	
	
	var pointer = this;
	
	
	// create ajax request
	//
	if (typeof(this.oP.script) == "function")
		var url = this.oP.script(encodeURIComponent(this.sInp));
	else
		var url = this.oP.script+this.oP.varname+"="+encodeURIComponent(this.sInp);
	
	if (!url)
		return false;
	
	var meth = this.oP.meth;
	var input = this.sInp;
	
	var onSuccessFunc = function (req) { pointer.setSuggestions(req, input) };
    var onErrorFunc = function (status) { };
    // GR 19/01/2008 - can't think of a time we'd want to display this to customers
    // var onErrorFunc = function (status) { alert("AJAX error: "+status); };

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

_b.AutoSuggest.prototype.setSuggestions = function (req, input)
{
	// if field input no longer matches what was passed to the request
	// don't show the suggestions
	//
	if (input != this.fld.value)
		return false;
	
	
	this.aSug = [];
	
	
	if (this.oP.json)
	{
		var jsondata = eval('(' + req.responseText + ')');
		
		for (var i=0;i<jsondata.results.length;i++) {
			this.aSug.push(  { 'id':jsondata.results[i].id, 'value':jsondata.results[i].value, 'info':jsondata.results[i].info, 'section':jsondata.results[i].section }  );
		}
	}
	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.aSug.push(  { 'id':results[i].getAttribute('id'),
                    'value':results[i].childNodes[0].nodeValue,
                    'info':results[i].getAttribute('info'),
                    'flag':results[i].getAttribute('flag')}  );
*/
			if (results[i].hasChildNodes()) {
				attr = results[i].attributes;
				obj = "{ 'value':results[i].childNodes[0].nodeValue";
				for (var j=0;j<attr.length;j++) {
					var at = attr[j].name;
					obj +=", '"+at+"':results[i].getAttribute('"+at+"')";
				}
				obj += "}";

				eval('object = ' + obj);
				this.aSug.push( object );
			}
		}
	
	}
	
	this.idAs = "as_"+this.fld.id;
	

	this.createList(this.aSug);

};

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

	// create and populate table
	//
	var table = _b.DOM.cE("table", {cellSpacing:"0", id:"as_ul"});
	var tbody = _b.DOM.cE("tbody");

	table.appendChild( tbody );

	// loop throught arr of suggestions
	// creating a tr element for each suggestion
	//
	for (var i=0;i<arr.length;i++) {

		var checkRow = (i%2) ? "even" : "odd";

		var tr = _b.DOM.cE("tr",{className:checkRow});
		tbody.appendChild( tr );

		var val = arr[i].value;
		var st = val.toLowerCase().indexOf( this.sInp.toLowerCase() );

        var output;

        if (arr[i].id ==0) {
	        // if its a 'click here for more options' link, add bold tags and dont highlight
            output = arr[i].info + ", click here for more options";
    		var td 		= _b.DOM.cE("td", {colSpan:"5", className:"moreresults"}, output, true);
			tr.appendChild( td );

    	} else if(arr[i].id == 1){
	        // if its a label link, add bold tags and dont highlight
            output = arr[i].info;
    		var td 		= _b.DOM.cE("td", {colSpan:"5", className:"label"}, output, true);
			tr.appendChild( td );
        } else {
			// format output with the input enclosed in a EM element
			// (as HTML, not DOM)
            output = val.substring(0,st) + "<em>" + val.substring(st, st+this.sInp.length) + "</em>" + val.substring(st+this.sInp.length);
			var td 		= _b.DOM.cE("td", {}, output, true);
			tr.appendChild( td );
	
			var fields = arr[i].info.split(",");
	
			for (j=0; j<fields.length; j++) {
				if(j==0) {
				  flagSrc = "/content/lmiu/imgs/flagz/"+arr[i].flag+".png";
				  flagOutput = "<img src='"+flagSrc+"'> "+fields[j];
				} else {
				  flagOutput = fields[j];
				}
				tr.appendChild(_b.DOM.cE("td", {}, flagOutput, true));
			}
        }

		tr.name = i+1;
		tr.onclick = function () {
		    pointer.setHighlightedValue(); 
			return false; 
		};
		
		tr.onmouseover = function(){
			pointer.setHighlight(this.name);
		};
	}
	
	// no results
	//
	if (arr.length == 0 && this.oP.shownoresults)
	{
		var noresults = _b.DOM.cE(  "div", {className:"noresults"}, "Sorry no results matching your search string." );
		div.appendChild( noresults );
	}
	
	div.appendChild( table );
	
	// get position of target textfield
	// position holding div below it
	// set width of holding div to width of field
	//
	var pos = _b.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

	document.getElementById("search_bar").appendChild(div);

	// currently no item is highlighted
	//
	this.iHigh = 0;






	// remove list after an interval
	//
	var pointer = this;
	this.toID = setTimeout(function () { pointer.clearSuggestions() }, this.oP.timeout);
};

_b.AutoSuggest.prototype.changeHighlight = function(key)
{	
	var list = _b.DOM.gE("as_ul").childNodes[0];
	if (!list)
		return false;
	
	var n;

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

_b.AutoSuggest.prototype.setHighlight = function(n)
{
	var list = _b.DOM.gE("as_ul").childNodes[0];
	if (!list)
		return false;
	
	if (this.iHigh > 0)
		this.clearHighlight();
	
	this.iHigh = Number(n);
	jscss('add',list.childNodes[this.iHigh-1],'as_highlight');


	this.killTimeout();
};

_b.AutoSuggest.prototype.clearHighlight = function()
{
	var list = _b.DOM.gE("as_ul").childNodes[0];
	if (!list)
		return false;
	
	if (this.iHigh > 0)
	{
		jscss('remove',list.childNodes[this.iHigh-1],'as_highlight');
		this.iHigh = 0;
	}
};

_b.AutoSuggest.prototype.setHighlightedValue = function ()
{
	if (this.iHigh) {
        // only replace the selection if ID of object is not null, so we we 'view more search results' it
        // does not
        if (this.aSug[this.iHigh-1].id!=0 && this.aSug[this.iHigh-1].id!=1) {
            this.sInp = this.fld.value = this.aSug[ this.iHigh-1 ].value;
            // move cursor to end of input (safari)
            //
            this.fld.focus();
            if (this.fld.selectionStart)
                this.fld.setSelectionRange(this.sInp.length, this.sInp.length);
        }

        this.clearSuggestions();
		// pass selected object to callback function, if exists
		//
		if (typeof(this.oP.callback) == "function")
			this.oP.callback( this.aSug[this.iHigh-1] );

		return false;
	} 
};

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

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

_b.AutoSuggest.prototype.clearSuggestions = function ()
{
	
	this.killTimeout();
	
	var ele = _b.DOM.gE(this.idAs);
	var pointer = this;
	if (ele)
	{
		var fade = new _b.Fader(ele,1,0,250,function () { _b.DOM.remE(pointer.idAs) });
	}
};


// AJAX PROTOTYPE _____________________________________________


if (typeof(_b.Ajax) == "undefined")
	_b.Ajax = {};

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

_b.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr)
{
	
	if (meth != "POST")
		meth = "GET";
	
	this.onComplete = onComp;
	this.onError = onErr;
	
	var pointer = this;
	document.getElementById('quick_search_input').className = 'text_ajax-loading';
	
	// 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();
		}
	}
};

_b.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 );
			document.getElementById('quick_search_input').className = 'text_ajax-loaded';
		} else {
			this.onError( this.req.status );
		}
	}
};


// DOM PROTOTYPE _____________________________________________


if (typeof(_b.DOM) == "undefined")
	_b.DOM = {};

/* create element */
_b.DOM.cE = function ( type, attr, cont, html ) {

	var ne = document.createElement( type );

	if (!ne)
		return 0;
		
	for (var a in attr)
		ne[a] = attr[a];
	
	var t = typeof(cont);
	
	if (t == "string" && !html)
		ne.appendChild( document.createTextNode(cont) );
	else if (t == "string" && html)
		ne.innerHTML = cont;
	else if (t == "object")
		ne.appendChild( cont );

	return ne;
};

/* get element */
_b.DOM.gE = function ( e )
{
	var t=typeof(e);
	if (t == "undefined")
		return 0;
	else if (t == "string") {
		var where = document.getElementById( "search_bar" ); 
		  
		var re = document.getElementById( e );
		if (!re)
			return 0;
		else if (typeof(re.appendChild) != "undefined" )
			return re;
		else
			return 0;
	}
	else if (typeof(e.appendChild) != "undefined")
		return e;
	else
		return 0;
};

/* remove element */
_b.DOM.remE = function ( ele ) {
	var e = this.gE(ele);
	
	if (!e)
		return 0;
	else if (e.parentNode.removeChild(e))
		return true;
	else
		return 0;
};

/* get position */
_b.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(_b.Fader) == "undefined")
	_b.Fader = {};

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

_b.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.e.filters) // internet explorer
	{
		try
		{
			this.e.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.e.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity='+ieop+')';
		}
	}
	else // other browsers
	{
		this.e.style.opacity = op;
	}
	
	
	if (this.nTime == this.nDur)
	{
        clearInterval( this.nID );

		if (this.cb != undefined)
			this.cb();
	}
};

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

function jscss(a,o,c1,c2)
{
  switch (a){
    case 'swap':
      o.className=!jscss('check',o,c1)?o.className.replace(c2,c1): o.className.replace(c1,c2);
    break;
    case 'add':
      if(!jscss('check',o,c1))
	    {o.className+=o.className?' '+c1:c1;}
    break;
    case 'remove':
      var rep=o.className.match(' '+c1)?' '+c1:c1;
      o.className=o.className.replace(rep,'');
    break;
    case 'check':
      return new RegExp('\\b'+c1+'\\b').test(o.className)
    break;
  }
}